Original Prusa MMU3 upgrade kit (for MK4S/MK3.9S)

The Original Prusa MMU3 (Multi-Material Upgrade) is an advanced add-on kit for the MK4S and MK3.9S 3D printers, enabling seamless multi-material and multi-color printing with a single extruder. This upgrade allows your printer to automatically switch between up to five different filaments during a print job, vastly expanding your creative possibilities without the need for manual intervention.
The MMU3 brings significant mechanical and firmware improvements over its predecessor (MMU2S), including a completely redesigned filament loading mechanism, an easier calibration process, and enhanced reliability. Combined with PrusaSlicer’s smart wipe-to-infill and wipe-to-object techniques, this upgrade helps reduce filament waste while delivering vibrant, professional-looking results. The MMU3 is designed specifically to work optimally with the MK4S and MK3.9S models and comes with everything needed for DIY installation.

Key Features:

1. Supports Up to 5 Filaments: Enables automatic multi-material or multi-color printing using one nozzle.
2. Redesigned Selector Mechanism: Improved loading/unloading performance and minimized filament jams.
3. Enhanced Firmware Integration: Seamless compatibility with MK4S / MK3.9S and updated PrusaSlicer support.
4. Reduced Filament Waste: Utilizes advanced wipe strategies including wipe-to-infill and wipe-to-object.
5. DIY Upgrade Kit: Includes all mechanical and electronic components required for assembly.
6. Compatible with Standard 0.4 mm Nozzle: Optimized for printing with the stock nozzle for best performance.

Additional Details:
• Type: Multi-Material Upgrade Kit
• Compatibility: Original Prusa MK4S / MK3.9S
• Filament Inputs: 5
• Recommended Nozzle Size: 0.4 mm
• Assembly: DIY (detailed online manual included)
• Software: Fully supported by PrusaSlicer

What's Included

• MMU3 unit components (selector, filament buffer, etc.)
• Standard 0.4mm nozzle (recommended for MMU3 use)
• All necessary hardware and electronics for assembly
• Digital assembly manual