Original Prusa i3 MK3S+ kit

The Original Prusa I3 MK3S+ is the successor of the award-winning Original Prusa i3 MK2 3D printer. With the rebuilt extruder, a plethora of sensors and the new magnetic MK52 heatbed with replaceable PEI spring steel print sheet we believe that we've developed our best 3D printer yet!  

This listing is a DIY KIT for self-assembly. We also offer a fully built and tested 3D printer.

Warning for US customers: If you select the combination with both steel sheets, your order will exceed $800 (with shipping) and you may be charged with customs duties. More info

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Orders have a leadtime of 3-4 weeks. Check out the shipping table.


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Continuous development of the Original Prusa i3 MK3 and MK3S leads us to the enhanced and improved Original Prusa i3 MK3S+ released on November 24. 2020 and announced on PrusaPrinters.org



SuperPINDA is temperature-independent, it features a much higher quality sensor and better quality components overall comparing with the P.I.N.D.A. v2, plus, it does not need a thermistor. A combination of all these enhancements ensures the first layer will always be spot on!


We now have a new set of metal clips for the MISUMI bearings on Y-axes. They are easier to mount and provide better support for the bearings. X-axes belt tensioning mechanism was reworked and X-end plastic parts reinforced. Extruder changes provide better printability for flexible filaments.


MK3S+ includes all the cumulative upgrades from the entire life cycle of the MK3 like genuine Gates belts, textile sleeves, a new Einsy case for easier Raspberry Pi connection, an anti-rust coating on smooth PEI sheets and, of course, dozens of firmware and plastic parts enhancements.

The Original Prusa i3 MK3/S+ is the "Best 3D printer" according to All3DP.com and MAKE: Magazine, where MK3/S+ also received "Editor's Choice" as the highest-rated 3D printer in 2019 Digital Fabrication Guide. The MK3S+ features a rebuilt extruder, numerous sensors, and various smart features. Plus, a new magnetic MK52 heatbed with a replaceable PEI spring steel print sheet. Dozens of various tweaks and upgrades improve the reliability and ease of use. MK3S‘s functionality can be further expanded with the unique Multi-Material Upgrade 2S addon for printing with up to 5 materials simultaneously. Below, you can see some of the many 3D printer awards Prusa Research received.


The most significant features of Original Prusa i3 MK3S+


The new MK52 Magnetic Heatbed holds a replaceable alloy spring steel sheet with a PEI surface. You can choose between two types of sheets - smooth PEI sheet (default option) and textured powder coated PEI


With the MK3S+ we are introducing the reworked Y axis from aluminum extrusion. It provides the same rigidity as some other printers while providing the sleek look of our milled Dural frame. The frame is also optimized to add 10 mm of Z height totaling at 210 mm.


The previous sensor didn’t work well with some specific filaments. The new sensor is using the optical sensor which is triggered by a simple mechanical lever. This sensor doesn’t care about the optical properties of the filament and cannot die because of mechanical wear.


Thanks to the new Trinamic2130 drivers and Noctua fan, the MK3S+ is extremely quiet in the stealth mode. But the MK3S+ is quieter than 99 % of the available printers, even in the Normal mode. In normal mode, we have also increased the travel speed. Now you can achieve up to 200 mm/s!


Have you ever tripped over the extension cord and lost a 20-hours print? MK3S+ will save you! The printer can fully recover from the loss of power. It detects power interruption and shuts down the heatbed and extruder heating. After restoring the power, you can continue with printing.


Thanks to completely reworked extruder changing the nozzle or PTFE tube is easier than ever before. As a bonus, the nozzle and the extruder motor is much closer to the X axis, this means less resonance and better prints too. MK3S is also better for printing from flexible materials.


The new EINSY RAMBo motherboard with Trinamic drivers not only makes the MK3S+ silent but it also can detect skipped steps and layer shifting. This is a big step forward in the reliability of the printer and the user comfort. You can say goodbye to ugly prints!


The extruder has now upgraded with Bondtech drive gear. It grips the filament from both sides, increasing the push force and making the printer more reliable. This is useful especially for flexible filaments. Also, the print fan now cools part from two sides, increasing the overall performance.


E3D V6 is market-leading all metal hotend well known for its high-temperature performance. The MK3S+ utilizes a custom heatbreak developed together with E3D. The reliability has proved in our Multi Material upgrade and continues to deliver great performance in surprisingly small form factor.

Read more about features of our brand new Original Prusa i3 MK3S+ in the article at PrusaPrinters.org

Check out the official announcement video!

Original Prusa i3 MK3S assembly timelapse



"Designers that rely on 3-D printing as part of their livelihood use Prusa printers to turn out consistent, quality results. These kits contain expertly chosen parts, with an eye on recent technological upgrades.” Read more...


"We tested it using its default settings and found it extremely capable. Its print quality is truly exceptional and it’s an easy-to-use, straightforward machine.” Read more...


"If you're looking for your first 3D printer, you like to tinker, or you run a business and want a good reliable machine then look no further than the Original Prusa i3 MK3S.” Read more...


"The team at Prusa Research have made something special with the MK3. If you only ever own one printer, make it this one. Of course, once you buy it you will want more of them, and that's ok too.” Read more...


"As the test shows, the Prusa Research Original Prusa i3 MK3S did a lot right. It is well processed, has many great features and the printing costs are very low. Especially the print quality is excellent.” Read more...


"You can get under the hood and tinker with this or change that, but you don’t have to. MK3S is a printer that ‘just works’ for beginners, yet is still powerful enough for advanced use. 10/10” Read more...


"In short. What I don't like about this printer? The rubber feet. What I like? Absolutely everything else!” Watch the video...


"Using this 3D printer has been a joy and an education. (...) The Original Prusa i3 MK3 is highly, thoroughly, and unreservedly recommended.” Read more...


"This has a lot of really exciting features that are pushing what the industry is going to be doing.” Watch the video...


"MK3 - highly recommended. I'm really looking forward to everything this printer does becoming standard everywhere.” Watch the video...


"With it's combination of useful new features, along with the reliability and quality of the prints, this is a 3D printer that, especially in the kit form, offers a great price-performance ratio.” Watch the video...


"Josef Prusa and Prusa Research sent over a fully assembled Prusa i3 mk3 3d printer for me to test out and show off on the channel.” Watch the video...


"The smarts, the removable print surface and dependable quality make it perfect for design and prototyping.” Watch the video...


"It is without a doubt the best 3D printer under $1,000 (...) It offers outstanding quality for a reasonable price and comes with a truckload of features.” Read more...



  • Removable magnetic spring steel sheet with PEI surface (*)
  • Brand new EINSY RAMBo motherboard
  • Silent Trinamic drivers with 256 microstepping
  • Maximum travel speed up to 200 mm/s
  • Sensorless homing for X and Y axes
  • Detection and recovery of shifted layers
  • Improved frame rigidity with aluminum extrusions
  • Power loss detection and recovery
  • Better cooling from both sides of the object
  • Optional WIFI with Octoprint interface
  • Bondtech extruder drive - filament is driven from both sides
  • IR filament sensor
  • Automatic loading of filament when filament is inserted
  • Both extruder cooling fan and print cooling fan detect RPM. When extruder fan is blocked, the printer will stop to prevent damage of extruder. The same applies for the print cooling fan.
  • Extra silent Noctua fan
  • New temperature-independent SuperPINDA with no temperature drift (more info)
  • Reliable hight quality MISUMI Bearings

* Consumable parts, such as PEI sheets (smooth, textured, etc.) are not covered by warranty as the coatings are designed to diminish over time unless failure has occurred due to a defect in materials or workmanship. Cosmetic damage, including but not limited to scratches, dents, cracks or other cosmetic damage is also not covered by the warranty. Only defective sheets on arrival are covered by warranty.


  • Great build volume11,025 cm3 (25 x 21 x 21 cm or 9,84 x 8,3 x 8,3 in) (X×Y×Z)
  • Integrated LCD and SD card controller (8GB included)
  • 0.4mm nozzle (easily changeable) for 1.75 mm filament
  • Layer height from 0.05 mm
  • Automatic mesh bed leveling
  • Heatbed with cold corners compensation – for warpless 3D printing from any material
  • Automatic skew axes compensation
  • Hassle free PEI print surface - no glass, no glue, no ABS juice
  • Supported materials – PLA, ABS, PET, HIPS, Flex PP, Ninjaflex, Laywood, Laybrick, Nylon, Bamboofill, Bronzefill, ASA, T-Glase, Carbon-fibers enhanced filaments, Polycarbonates...
  • Easy multicolor printing based on layer height
  • 1 kg (2 lbs) silver PLA filament included
  • Kit box dimensions: 11 kg, 42×43×24 cm; 16.5×16.9×9.5 in (D×H×W)
  • Assembled printer box dimensions: 11 kg, 52×48×54 cm; 20.5×18.9×21 in (D×H×W)
  • Printer dimensions (without spool): 7 kg, 55×40×50 cm; 21.6x15.7x19.6 in (D×H×W)
  • Power consumption: PLA settings: 80W / ABS settings: 120W


Great support

We are an established company founded in 2012, and we work hard to help you start 3D printing as soon as possible. We are providing full 24/7 customer support with live chat and e-mail in several languages. There are also unofficial user groups on Facebook, where makers help each other. You will never be alone in the big world of 3D printing!

The MK3S+ comes along with a forum support where our ever-growing community can always help, or you can even get in touch with Jo Prusa himself at the very same spot! Check out the forum and regularly updated Knowledge Base!

With 3D printing, buying a printer is just a beginning!

Fun to assemble

Assembling the kit is an excellent first step to the world of 3D printing. You will understand the principles of printer construction and get a huge advantage when you need to solve possible problems and replacements later.

But don't worry. Assembling is quite easy! You don't have to solder at all to build our kit. You don't even have to own a soldering iron. All our cables are cut to length and with professionally crimped connectors. And from the electronics standpoint, the hardest thing will be plugging the connectors to the motherboard.

All of this makes the kit very friendly to younger builders :-)

Best assembly instructions and free 3D Printing handbook

We didn't want to leave anything to chance, so our assembly instructions are pictured to the smallest detail.

See the assembly manual for yourself!

All fasteners and mechanical parts have 1:1 drawing so you can easily find them, and there is no chance of you picking a wrong one. You don't have to be MIT graduate to assemble our kit ;-)

Our fastest customer built the kit in 4 hours! Will you beat him?

Ready to print settings

We provide high print settings with the printer, so you don't have to dive into complex new programs the second you finish the build. You can start printing right away, and this gives you a great head start!

These settings are great for all kinds of objects, not just for a couple of prepared showpieces. After a while, when you're familiar with the printer, you can, of course, dive into tinkering ;-)

We are developing our own slicing software. PrusaSlicer is a feature-rich, frequently updated tool that contains everything you need to export the perfect print files for your Original Prusa 3D printer. But of course, we also have the settings for the third party slicers like Simplify3D, Cura, etc.


One of the most popular features of Original Prusa i3 concept is upgradability. If you buy our 3D printer, you can upgrade it later to the new version, so you don't need to buy the whole new model every two years as you get used to for example with your phone or laptop. :-)

Upgrades are a great way not only for saving money, but also to learn about the construction of the printer's hardware. We are constantly improving our technology. A few years ago there was the Original Prusa i3 3mm which was upgradable to the Original Prusa i3 Plus 1.75mm (MK1). MK1 printer can become MK2S thanks to the next big upgrade and then you can go even for the latest MK3S+ (or MK2.5S if you wish).

Discount program for Original Prusa i3 kit owners

Our discount program for the Original Prusa i3 kit owners gives you a 5% discount on subsequent orders of selected filaments, including the high-precision Prusament!

How does it work?

To enter the discount program, you only need to purchase your first Original Prusa i3 kit for the full price. After the i3 kit is delivered to you, your Prusa account automatically applies the 5% discount on the selected filaments. So next time you'll be stocking up on filaments you can take advantage of the 5% discount :-). Make sure to be always logged into your Prusa account, to have the discount applied.

Ready for the Multi Material Upgrade 2S

Original Prusa i3 MK3S+ Multi Material 2S is the unique consumer option to print with up to 5 different materials simultaneously. MMU2S comes with a redesigned body and a new filament loading mechanism. Instead of the previous Bowden system. The motorized selector head has a F.I.N.D.A filament sensor and a built-in blade, which prevents filament jamming.

Multi-material could be your next step in the 3D printing world and MK3S+ is completely ready for the upgrade.

BTW: Do you know, that you can easily print soluble interface supports with Multi Material upgrade? We have a pretty smart solution for you - check out the video!

Quality guaranteed by Josef Prusa & Prusa Research

Prusa Research is a 3D printing company based in Prague, Czech Republic. It was founded by Josef Prusa, one of the core developers of the Open Source project RepRap, in 2012 as a one-man startup and grows to a 160+ team now.

The open-sourced Prusa i3 design is according to 3DHubs the most used 3D printer in the world.

Today we are shipping more than 6000 Original Prusa i3 printers per month to over 120 countries directly from Prague.

Original Prusa i3 MK3S+ Original Prusa i3 MK2S Original Prusa i3 MK3S+ Multi Material Upgrade 2S

Build volume

25 x 21 x 21 cm | 9.84 x 8.3 x 8.3 in25 x 21 x 20 cm | 9.84 x 8.3 x 825 x 21 x 21 cm | 9.84 x 8.3 x 8.3 in

Layer height

0.05 – 0.35 mm0.05 – 0.35 mm0.15 – 0.35 mm

Max travel speed

200+ mm/s100 mm/s200+ mm/s

Max hotend/heatbed temp.

300 °C / 120 °C (572 °F / 248 °F)300 °C / 120 °C (572 °F / 248 °F)300 °C / 120 °C (572 °F / 248 °F)

Print surface

removable magnetic heatbed /
PEI spring steel sheets

heated with cold corners compensation /
PEI hassle free

removable magnetic heatbed /
PEI spring steel sheets

Number of materials (simultaneously)


Supported materials

Any thermoplastic including Nylon and Polycarbonate

Any thermoplastic including Nylon and Polycarbonate

Any thermoplastic including soluble supports - PVA, BVOH...

Special features

SuperPINDA, MISUMI Bearings,
Bondtech gears, Noctua fan,
extra silent Trinamic drivers


Direct drive extruder, filament cutter, reduced wipe tower - wipe into infill/object, manual controls, finishing filament scraps

Filament sensor

Yes (IR)


Yes (mechanical)

Power panic




Octoprint compatibility




Advanced sensors

3 thermistors, fans sensor,
shifted layers

2 thermistors

3 thermistors, fans sensor,
shifted layers


automatic 9 points XYZ / skew axes compensation

automatic 9 points XYZ / skew axes compensation

automatic 9 points XYZ / skew axes compensation

Kit price

769€ VAT incl. or $749

619€ VAT incl. or $599

299 € VAT incl. or $299

Assembled printer price

999€ VAT incl. or $999

919€ VAT incl. or $899


E-shop link




I have never seen a printer go over a year with 4-5 different transitions of locations just to print perfectly without any required work or calibration to be redone.

I have easily convinced four other people already to go with PRUSA Mk3s when they asked which brand was the best. With an $800 price tag, the PRUSA blows away nearly all of the competition of printers that costs double what the PRUSA does.

  • 22 out of 23 people found this review useful.

Won over by QUALITY

After delivery of the kit, I took my time reading all the material and going online to view assembly suggestions, etc. Time well spent. Though not necessary, the provided instruction book was everything I really needed. A great deal of effort was put into the preparation of this manual. I strongly urge future kit builders to read all the instructions, and NOT be tempted to assemble by picture alone. The manual even states this. Trust me, you will save yourself much frustration by following this advice. After the assembly, and then using the included handbook for configuration and calibration I was pleasantly surprised that the first check of everything was OK. ALL WAS VERIFIED. Happy beyond compare. Did several first layer calibrations and then several sample prints. I can't adequately describe how pleased I was with the results. To any one that wonders if purchasing a Prusa is worth it, YES. Hands down compared to the 4 other knock offs I have purchased, upgraded and tinkered with. None of them even after multiple enhancements can even come close to what my i3 MK3S kit does when properly calibrated and assembled. As other's have stated, I too will be a long term Prusa customer. Thank you for providing a product that lives up to the legend you have created with quality.

  • 14 out of 14 people found this review useful.

Awesome Device, Great Project

Doing the assembly myself was a very satisfying way to learn about 3D printing. I'm not an engineer, but I like to tinker and this project was a great investment for me. I took 14 hours and 30 minutes, but I was being very careful because I wanted to be sure I knew what I was doing with each step. You have to be patient and careful, but it's an enjoyable accomplishment to get it all together and start printing. This is my second 3D printer, and it's a big upgrade. The quality, precision and size of the prints is impressive. I've got a lot to learn, but I'm really excited about it after about six weeks post assembly. I highly recommend this product and the project - but be prepared for it to be a big project.

  • 4 out of 4 people found this review useful.

Goodbye Ender 3 Pro, Hello Prusa i3 MK3S!

I performed dozens upon dozens of upgrades on my Ender 3 Pro like Direct Drive, BlTouch ABL, SKR Mini V1.2 and Touch Screen, etc. No matter what, I still wasn't getting the quality I wanted, and no matter what I did, I couldn't get parts to stop warping. I felt like I was genuinely going insane, as I had poured hours upon hours of work into making it "better."

I got my i3 MK3S kit last weekend, and after 4 days of on and off assembly, I can confidently say that the price of this machine is heavily justified. I got the print quality I wanted immediately, and switching between materials is incredibly straightforward.

Thank you Josef Prusa and the entire Prusa Team for creating a magnificent printer. I won't be buying a non-Prusa printer ever again.

  • 19 out of 19 people found this review useful.

Unpacked, built, started, worked!

Building this 3d printer kit is a real experience. The detailed manual will guide you step by step through the process and leaves no room for guesses.

After building this printer, I started the first prints and they finished with no problems.

Since then, I started printing parts for the enclosure, then tools, holders - small and large items in PLA and PETG (Prusament) and had no single failure or problem.

Well done!

  • 7 out of 7 people found this review useful.

Good printer, but I recommend the assembled version

Ordered the kit and definitely must say it was exciting and partly fun to build it. I've only build computers before so this was a challenge! But according to the calibration afterwards I was doing it pretty precisely.

However, I must say it's really annoying to get the nuts in the 3D printed parts sometimes. It's much better if they are loose. The screw pull technique sadly doesn't work everytime, so only my hammer was able to get it in the nut trap (be very careful though!). All the metal parts were relatively easy and straightforward to assemble! If the 3D printed parts were already prepared, this would have been really easy! I can understand that they want to save money and stuff, but seriously, if I knew this before I'd have ordered the fully assembled version.

After assembling (took me about two days, because I wanted to be very very careful) the calibration was pretty much straightforward! Sadly, I'm still no 3d printer expert, so I wasn't sure if I was doing everything correct...I did what the manual and the handbook said, calibration was alright but it still didn't print correctly.

It took me some tries and I had to readjust the PINDA sensor a few times which was a hassle because of the 3d printed part, but I think it's now relatively going well, even though there are some issues with the first layers sometimes and I'm struggling to identify the issue. I doubt it's the printer's fault though.

My old 3d printer was having similar issues, so I hope I'll be able to solve these.

The first correct print was in good quality, similar to what my Monoprice Voxel did. I just hope this printer lasts longer. All of the security measures are definitely a pro, and the specs itself are better than other printers.

Anyway, because of the quality of the 3d printed parts for the printer itself I cannot give 5 stars, but it's really incredible how nice everything works, even if a noob like me builds it.

  • 9 out of 15 people found this review useful.

The "fire-and-forget" printer

This will be a short review. I started with a mistake by buying the rough textured sheet with the kit instead of the smooth one. As I mostly print PLA, I had lots of issues with prints getting loose and the problems resulting of that. Since I noticed that this was a mistake and I ordered the smooth one, prints stick like hell and I now can start prints and walk away, letting the machine run for days without being concerned. It's just great. So - please do better than me and read the description of the two sheets, so you can pick the correct one - or order both.

  • 13 out of 13 people found this review useful.

Took my 3D Printing To A New Level!

I purchased my MK3S Kit after seeing a few prints from a friend that had one. Now that I’ve completed the assembly and have been printing like a madman for several days, here’s the key value points:

ASSEMBLY (Kit vs Built): I didn’t have many issues assembling this kit. There are several opportunities for making mistakes, but if you actually read and follow the steps you will be fine. I spent about 12 hours of actual assembly. It requires only a basic mechanical skill. If you’ve done other DIY projects around your home with screws, nuts, etc. you’ll be fine. More important is patience and attention to detail. The included manual is great, but I used the online one as they update that more frequently, and you can see additional pictures you can zoom in when you need clarification.

INITIAL SETUP: The setup routine is quite easy to follow and complete. It does most of the tasks you’ve traditionally had to do manually (bed level, X/Y/Z calibration, hotend and bed temp tests, etc.) I ran in to a few issues when calibrating the bed level where the nozzle would grab the paper. As documented in their manual, the PINDA needed adjustment. I’ve had to do this twice and in both cases I had to adjust the Z level during the first layer calibration to about -0.600 to get a decent smoosh, but once set there’s few cases you’ll need to adjust it.

PRINT QUALITY: I’ve printed about 15 objects by now trying out Prusament PLA (came with printer), PETG, ASA, and a few non-Prusament PLAs. The Prusament gives the quality of premium filament at nearly the cost of standard filament. Other filament worked fine, but you’ll need to calibrate the temp and flow rates for best results. The removable/flexible sheet makes print removal a ‘snap’, Layer lines are less noticeable that anything I’ve printed before. In fact, I don’t have to sand these prints.

PROS: Well-documented assembly instructions, solid design and quality components, Removable/flexible steel print surfaces, easy/automated setup, flexible produces quality prints with less effort and tweaking, great support/community, most replacement parts are printable. Great Prusa Sc1cer software, larger print area than most in this price range.

CONS: PINDA Sensor is ‘touchy’ to get the right height, ‘stealth’ mode isn’t all that quiet, (kit) assembly may lead to gummy-bear addiction.

SUMMARY: This printer is better than I expected for the price. I’d recommend it as an intermediate (or step-up) printer for anyone with basic 3D printing knowledge. Overall quality is great and it’s a feature-packed printer. As most parts are printed, replacement parts are easy to obtain. Their customer service is great (I had a Chat about my order), and there’s a large support community. Firmware and Sl1cer updates replace the need for new hardware and boards (or printer).

  • 11 out of 11 people found this review useful.

Absolutely worth it, 100%, no questions

Got the kit, assembled in ~6-7 hours total. Manual was very easy to follow and comments/pictures online also helped when I was unsure. First time building a 3D printer myself and came the other side without fear of something not done right. First print after automated calibration came out perfect (PLA), everything after came out perfect. Super easy to use, extremely high quality results even on large/long prints. Works great with PrusaSlice and Simplify3D. Successful as well with PETG, not a single problem. Works great and very stable with Octoprint as well, unlike some other printers like MP SelectMini I had before.

I had on my 4th print an extruder jam caused by a model that had too many small features at 0.1mm layer height, which allowed heat creep. Followed disassembly instruction on KB, was up in running again in 30 minutes. PTFE tube was totally jammed/filled. THERE WERE SPARE PTFE TUBES IN THE BOX! Cannot believe that everything that needs a spare has multiple spares. There is not
a more turnkey printer kit than this.

You cannot regret buying this printer. You will learn a ton about how it works, it prints fast, quiet and very smooth, and KB/support are awesome. Highly recommended.

  • 16 out of 16 people found this review useful.

Very good and reliable printer

After using over 10 different 3d printers, including various methods, including FFF. This one easily beats them all. I'm taking into consideration some top brands like HP, Ultimaker, Stratasys. There's no way to beat the value and quality of Prusa for me. Big up and hope to see and buy more from these lovely Czech peeps :)

  • 8 out of 9 people found this review useful.

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Original Prusa i3 MK3S+ kit

Original Prusa i3 MK3S+ kit

The Original Prusa I3 MK3S+ is the successor of the award-winning Original Prusa i3 MK2 3D printer. With the rebuilt extruder, a plethora of sensors and the new magnetic MK52 heatbed with replaceable PEI spring steel print sheet we believe that we've developed our best 3D printer yet!  

This listing is a DIY KIT for self-assembly. We also offer a fully built and tested 3D printer.

Warning for US customers: If you select the combination with both steel sheets, your order will exceed $800 (with shipping) and you may be charged with customs duties. More info