Prusa Research Prusa Original MMU3 Enclosed (For Core One) - Conversion Kit

Original Prusa MMU3 Enclosed (for CORE One)

Multi-Material Printing Made Easy – Now for Your Enclosed CORE One

The MMU3 (Multi-Material Upgrade) brings true multi-color and multi-material capabilities to the Prusa CORE One. Whether you’re converting from an MK4S, upgrading with a full kit, or opting for a ready-to-go assembled unit, the MMU3 lets you print up to five filaments with speed, efficiency, and minimal waste.

Available Versions

MMU3 Enclosed – Conversion Kit

Perfect for users who already own a Prusa MK4S with MMU3 and want to transfer it to the Prusa CORE One. This kit includes the modified top cover to keep the printer fully enclosed, but requires you to disassemble your MK4S extruder to reuse necessary parts.

MMU3 Enclosed – Assembled 

This version includes a fully assembled MMU3 and all components needed for CORE One installation. It's a great choice if you want to skip the assembly process and jump straight into multi-material printing.

MMU3 Enclosed – Full Kit

Includes the MMU3 assembly kit, extruder parts, buffer plates, spool holders, cover parts, and everything else needed to expand your CORE One. This is the best option for users who are starting fresh or want the full Prusa MMU experience without reusing parts.

What’s Included

• Original Prusa MMU3 unit (assembled or kit depending on version)
• Modified top cover for enclosed CORE One setup
• MMU electronics and motor set
• Prusa 0.4mm brass nozzle (standard)
• SuperFINDA sensor
• PTFE tubes
• Printed parts
• Fasteners
• Extruder mechanical and printed parts (Full Kit only)
• Buffer plates (6x)
• Spool holders (5x)
• Cover parts

Main Features

Fastest Single-Nozzle Multi-Material Printing

Rapid filament swaps (35–45 seconds) significantly reduce print time compared to other multi-filament systems.

Smart Purging, Low Waste

Intelligent nozzle cleaning and efficient wipe tower use minimize color contamination and plastic waste.

Open Compatibility

No vendor lock-in—use 3rd-party filaments and spools of various sizes with custom spool holder options.

Precision Feeding System

Optimized filament path from spool to extruder minimizes tangling and ensures reliable, smooth feeding.

Smart Two-Way Communication

The MMU3 talks directly with your printer to display real-time status, error messages, and updates for a smoother user experience.

Easy Maintenance and Modularity

No glue, no guesswork—everything is designed to be easily disassembled and repaired if needed.

Full MMU Support in PrusaSlicer

Enjoy smart painting, wipe-to-infill, wipe-to-object, and Beam Interlocking to strengthen multi-color prints.

Slice Anywhere with EasyPrint

Design and print from anywhere using your browser or phone with EasyPrint’s integrated access to Printables.com.

Lite vs Enclosed Version: What's the Difference?

• Lite Version: Installs on top of the printer with the top panel removed—ideal for speed and simplicity, but sacrifices enclosure benefits.

• Enclosed Version: Includes a custom top cover to retain the CORE One’s fully enclosed setup while routing filament cleanly via PTFE tubing.

Important Nozzle Information

To ensure optimal MMU3 performance with your CORE One or MK4S, use the standard quick-swap nozzle rather than the high-flow version.

• Standalone MMU3 units include the standard nozzle.
• Bundles include both standard and high-flow nozzles.
• Assembled printers in MMU3 bundles come pre-installed with the standard nozzle.

Efficient Operation

The MMU3 minimizes color contamination during filament changes with its intelligent nozzle cleaning system. A compact wipe tower collects all purged material in one place, keeping transitions clean and your workspace tidy.

• Smart nozzle cleaning reduces color mixing during filament swaps
• Wipe tower ensures stable nozzle pressure and collects excess filament
• Cleaner transitions with less wasted material

Reduced Plastic Waste

The MMU3 helps reduce filament waste through advanced features in PrusaSlicer like wipe-to-infill and wipe-to-object. These options repurpose purge material into usable parts of your print, minimizing reliance on a separate wipe tower.

• Wipe-to-infill and wipe-to-object reduce plastic waste
• Ideal for functional or paintable parts
• Promotes sustainable, low-waste 3D printing

Outstanding Compatibility, No Vendor Locks

The MMU3 is fully open and compatible with a wide range of third-party filaments and spool sizes, including large 2kg rolls. You can even design or download custom spoolholders for different spool types.

• Supports a variety of spool sizes and materials
• Works seamlessly with third-party filaments
• Open design allows custom spoolholder upgrades

Smooth Filament Feeding System

Filament flows smoothly through the MMU3 thanks to a well-designed path from buffer cassette to extruder. This arrangement minimizes resistance and reduces tangling for reliable, jam-free performance.

• Optimized path for smooth filament travel
• Buffer cassettes improve organization and flow
• Reduces jams and increases multi-material reliability

Enhanced Firmware with Two-Way Communication

The MMU3 firmware communicates directly with your printer for a fully integrated experience. It monitors filament status, displays live updates, and allows manual or automated adjustments for seamless operation.

• Two-way printer communication improves reliability
• Real-time error messages and status updates
• Easy control via LCD or onboard buttons