Original Prusa i3 MK2.5S/MK3S Multi Material 2S upgrade kit (MMU2S)

Original Prusa i3 MK3 Multi Material 2.0 is the unique consumer option to print with up to 5 different materials simultaneously. This enhanced version is much simpler than original MMU which makes it easier to use and less sensitive to the quality of filament.

If you already have MM for MK2/S, you should buy Multi Material upgrade kit - from MK2 to MK2.5/MK3

Más detalles

Shipping within 2 weeks temporarily.


  No tax


Now compatible with the Original Prusa i3 MK2.5 and MK3 3D printers, MMU 2.0 went through a major revision, resulting in a simpler and more reliable design. The number of simultaneously supported filaments increased to the total of five, which enables the users to print even more complex and more colorful objects.

MMU 2.0 comes with a redesigned body and a new filament loading mechanism. Instead of the previous Bowden system, the new unit uses a direct-drive feed and a single PTFE tube to lead the selected filament to the extruder. The motorized selector head has a F.I.N.D.A filament sensor and a built-in blade, which prevents filament jamming.

Read more about MMU 2.0 in the blog post at Prusaprinters.org.


Introducing MMU 2.0

How does MMU 2.0 work?


The most significant new features of Original Prusa i3 MMU 2.0


MMU 2.0 has a brand new body with a rotating pulley barrel and a single extruder motor. Load up to 5 filaments and the selector head with a filament-cutting blade will take care of automatic loading and unloading.


The second generation of our Multi Material Upgrade supports up to 5 filaments loaded at the same time. Apart from usual materials like ABS, PETG or PLA, the MMU 2.0 also works great with soluble supports (BVOH or PVA).


We have replaced the previous generation's Bowden system with a new direct-drive mechanism. This change is a major step forward in making the filament loading process more reliable and less prone to jamming.


Meet F.I.N.D.A! It's essentialy a repurposed P.I.N.D.A probe, which now serves as a filament sensor. It works on a mechanical basis - the string of filament lifts a small stainless steel ball and F.I.N.D.A detects its proximity.


Our slicing software Slic3r PE comes with full MMU 2.0 support and a set of useful features, such as Smart wipe tower, Wipe into infill or Wipe into object. These features help you save time and filament.


Powered by a new board, the MMU 2.0 takes advantage of features present on the MK3 itself - such as Trinamic drivers with auto-homing mechanism. The board can be also flashed with updated firmware, so it can learn new tricks in the future.



  • Completely redesigned body: less complex and more reliable design
  • Printing with up to five filaments at the same time
  • Old Bowden system replaced with a direct-drive loading mechanism with only a single PTFE tube leading filament to the extruder
  • Less sensitive to filament quality
  • Second generation electronics
  • F.I.N.D.A. filament sensor
  • Motorized selector head with filament cutter
  • Power loss detection and recovery
  • Smart software features: Smart wipe tower, Wipe to infill, Wipe into object and many more
  • Works in two modes: Multi-Material Mode and Single Mode (Single mode is the same as printing on MK3/2.5).


Printer Compatibility:
  • Original Prusa i3 MK3
  • Original Prusa i3 MK2.5
Material Compatibility:
  • PLA
  • ABS
  • PETG
  • Flex (coming soon)
  • Soluble Materials (BVOH, PVA)



Tune your filament settings and it's perfect!

I've had the MMU2S on my MK3S for a little over a month now. Printing with primarily Inland & Hatchbox PLA & ABS. Once you have fine tuned your temperatures to achieve the "desired retracted filament tip" It prints flawlessly. I've ran a 22hr print with over 400 tool changes and not one single issue. Again, make sure you're tuning your filament profiles to get those "good tips".

  • 6 de 7 personas encontraron esta crítica útil.


Great piece of work guys! Very quick delivery in a secure box. I was very excited to assemble the MMU2S. because I already saw a lot of videos what this thing is able to do :)
Assembling was no big deal. Just follow the very good explained manual including pictures and you should be good.
THe very first start was tricky, till I understood what the issues are, how to get rid off and/or fix the problem. But once you are thru all this, you can start with the software. And once you understand that as well, than is the MMU2S a very powerful unit with all his options and possibilities!
So I am very happy having the Multi Material Unit 2S.
Since I have this, my printer is running almost 24/7 in my lack enclosure!
Thanks for all you efforts guys! Very nice work!
Greetings from Germany

  • 2 de 3 personas encontraron esta crítica útil.

Great work!

To use the MMU2S with fun and without repeating error messages, just follow the assambly instructions carefully and use quality Filament. I've successfully tested prusament, other premium Filament, "standart quality" and some Chinese Filament too. If you buy cheaper Filament, the risk of getting print errors raises much.

The MMU itself works perfectly! I love it :)

  • 2 de 3 personas encontraron esta crítica útil.

My MMU2S experience

Now that I've had the MMU2S upgrade running for a month, I feel that I can finally give my review.
The build was straightforward for me. Excellent documentation, if you take the time to read it and the comments thoroughly.
Once I got through the initial learning phase and understanding the process better I am completely satisfied with the usage, performance and model quality produced from this product. I am using the stock Prusa Slicer profiles and the LACK MMU enclosure for all my MMU printing.
I've posted a few of my personal MMU creations on PrusaPrinters and am blow away by the color details produced.
Like any new tool, you need to take the time to understand it before simply using it.
Steve, aka reddadsteve

  • 15 de 17 personas encontraron esta crítica útil.

Great Concept But Needs Refinement

I always loved the idea of printing in different colors and materials on the Prusa and this upgrade ways one of the reasons that I bought the printer. The problem is that the unit is EXTREMELY sensitive and requires days of tuning (both mechanically and in the slicer) to get it working perfectly. It is a great concept and creates some awesome parts but if you buy this plan for around a week of just tuning before your prints are perfect.

  • 13 de 14 personas encontraron esta crítica útil.

Best value upgrade for tinkers

This is not something for beginner I would say. The hardest part is to get things dialed in. Read instruction and troubleshooting carefully. You will be able to get really nice and consistent result

  • 5 de 6 personas encontraron esta crítica útil.

Great tool for your MK3!

Yeah, I'm the guy who wrote the first review. To be honest, Prusa makes some of the best innovations in the 3D Printing world. The review, which I made in early February, was a 3/5 simply because I thought the idea was unfinished and needed tweaking. The learning curve was steep.
However, the new update to this upgrade, and to the MK3, has changed my mind. A lot of my problems with the MMU2 was because of the loading and unloading sequence. If the temperature was off by 4 degrees, the chance of a jam increased dramatically. However, with the new redesign of the MK3S extruder, this has changed. Because of the new IR sensor, the loading sequence is a lot more consistent and I have not experienced a jam since I upgraded. Assembly is like the MK3S: it is relatively easy, but takes a while; luckily there is no section as difficult as the extruder in the MK3, which still was not very hard. If you're into building things yourself, this is for you!

Since the upgrade, the learning curve is more bearable and customer support is always there if you have a problem, which should be less frequent now.

My only problem with this is the wipe tower. Of course, this upgrade would be wayyyy more expensive if it added more nozzles and did away with the wipe tower, but for now, you will have a little block in the corner of your build plate that takes a significant amount of plastic to change the colors. Sometimes, if the color is not "purged" enough, it will leave marks on the print, so make sure you really dial in your color change settings.

Overall, a great improvement by Prusa and his team, hats off to you! You all have really changed my mind about this product and I wish the best to you and your projects.

I hope this helps, and good luck!

  • 3 de 4 personas encontraron esta crítica útil.

Great concept, but needs a little more development. Better for e

I've had this upgrade for my MK3 since late November. As with the MK3, the assembly was straightforward and only took me a day. However, it takes extremely precise tweaking of both physical parts and slicer settings to get good results. Took me more than a week to get consistent prints, but that was a long time ago and the firmware and hardware have been improved quite a bit since then. You may need to mess around with the perfect spring tensions, filament sensor height, and retraction settings before getting consistent results. But trust me, you'll get good prints eventually, but just be patient. If you have good experience in 3D printing troubleshooting and understand how the parts of this upgrade work, you should be fine in troubleshooting it yourself or people from forums can help you out. Make sure you know what you're doing with this! It may take a while to get good results.
However, this is still basically one of the best options for multimaterial printing on the market as of early 2019 for this price. Just be aware of what you're getting into.
I hope this helps, and good luck!

  • 304 de 316 personas encontraron esta crítica útil.
  • 1

Escriba una reseña

Original Prusa i3 MK2.5S/MK3S Multi Material 2S upgrade kit (MMU2S)

Original Prusa i3 MK2.5S/MK3S Multi Material 2S upgrade kit (MMU2S)

Original Prusa i3 MK3 Multi Material 2.0 is the unique consumer option to print with up to 5 different materials simultaneously. This enhanced version is much simpler than original MMU which makes it easier to use and less sensitive to the quality of filament.

If you already have MM for MK2/S, you should buy Multi Material upgrade kit - from MK2 to MK2.5/MK3