About the Product

Multi Material Upgrade 2S (MMU2S) is the second generation of our unique multi-material addon, which enables your 3D printer to print with up to 5 colors at the same time.

The MMU2S upgrade package contains the MMU2S unit and the filament buffer. MMU2S upgrade is compatible with the Original Prusa i3 MK3S/MK3S+ and MK2.5S. The original versions of MK2.5 and MK3 must be upgraded before installing the MMU2S unit.

Compared to the MMU1 (first generation of the Multi Material Upgrade), the MMU2S 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.

MMU2S comes with a redesigned body, new filament sensor, filament buffer 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.

To unlock the full potential of the MMU2S, use our latest PrusaSlicer slicing software, which comes with new features, such as Smart wipe tower, Wipe into infill or Wipe into object.


Introducing MMU 2/S

How does MMU 2/S work?

Main Features

Completely redesigned

MMU2S 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.

Up to five materials at the same time

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 MMU2S also works great with soluble supports (BVOH or PVA).

Direct Drive instead of Bowden system

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.

F.I.N.D.A filament sensor

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.

Wipe into infill / into object

Our slicing software PrusaSlicer comes with full MMU2S 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

Filament buffer included

The MMU2S comes with the Filament Buffer, a device designed to prevent filament tangling during loading / unloading process. The buffer allows you to position the five filament spools more freely and also saves valuable space on your desk.

Full Feature List

Multi Material Upgrade 2S Features

Compatibility Information

  • 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 with Trinamic drivers
  • F.I.N.D.A. filament sensor
  • Motorized selector head with filament-cutting blade
  • 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).
  • Included Filament Buffer prevents filaments from tangling during loading and unloading

Printer Compatibility:

  • Original Prusa i3 MK3S
  • Original Prusa i3 MK2.5S


Material Compatibility:

  • PLA
  • ABS
  • PETG
  • Soluble Materials (BVOH, PVA)

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