Which materials are supported?

The MMU3 is designed to offer the best performance with PLA and PETG - these are the most common 3D printing materials. You can experiment with more advanced materials, but the results may vary.

There are a lot of MMU3 variants, which is the right for me?

First decision is whether you want to keep your CORE One enclosed or if you are ok with leaving the top panel open. If you plan to print advanced materials like PCCF, ASA, ABS, or similar, we recommend the Enclosed version. Then, it's just about picking the assembly kit experience (build your own MMU3 by following our detailed guide) or the fully assembled model (a short installation is still required). Last, but not least, if you simply want to use an MMU3 you already have (e.g., for MK4S), you can use the Conversion Kit to transfer the MMU3 to CORE One+.

Is the MMU3 compatible with my existing CORE One?

Yes. The MMU3 Enclosed is designed specifically for the Original Prusa CORE One and Prusa CORE One+. To take advantage of the 2026 speed improvements, you need firmware 6.5.3 (printer) and 3.0.4 (MMU3) - both are free updates. No hardware modifications are needed beyond the standard installation steps.

Do I have to use Prusa brand filaments?

Absolutely not. The MMU3 has zero vendor lock-in. It works with any brand of filament on spools up to 2 kg. No RFID chips, no subscriptions, no proprietary anything. You can even download or 3D-print custom spoolholders for unusual spool sizes - the files are open source on Printables.

How much time does a filament swap actually add to a print?

After firmware 6.5.3, approximately 42 seconds per swap - down from 52 seconds, a 20% improvement. On a complex model with 400 swaps, that's roughly an hour saved. On The Lighthouse model with 3,777 changes, the update alone saves 9.5 hours of total print time. Similar competing systems take much more time to swap filaments.

How much filament gets wasted during color changes?

Significantly less than competing systems - 73% less on average for PLA and PETG in default configuration. PrusaSlicer offers wipe-to-infill (purge inside the object's own infill), wipe-to-object (use a second print as the purge zone), or a compact, partially hollow wipe tower. Many users report total purge waste lighter than the finished print itself.

Should I use a High Flow nozzle with the MMU3 for higher speeds?

No, we strongly recommend a standard 0.4mm nozzle for MMU printing. A High Flow nozzle (CHT/HF) provides only a theoretical 2% speed improvement on multi-color prints, but standard nozzles ensure a much cleaner filament unload, less waste, and reliably faster real-world performance. The MMU3 full kit includes the correct standard quick-swap nozzle.

Can I still print single-color with the MMU3 installed?

Yes, completely normally. Load one spool, slice without multi-material settings, and print exactly as you always have. The MMU3 is passive during single-filament jobs and has zero impact on single-color performance or speed.

What's included in the full kit?

Everything you need: the MMU3 unit, buffer cassette, spoolholders for five filaments, modified top cover (Enclosed version), PTFE tubing, all mounting hardware, and a standard quick-swap nozzle pre-optimized for MMU printing. No separate purchases required to start printing in color.

What happens if something goes wrong mid-print?

The MMU3's two-way firmware communication means it can detect and resolve many issues automatically - filament runouts, loading errors, and sensor faults often self-correct without pausing the print. When it genuinely needs you, it shows a clear error message on the CORE One's LCD with specific, actionable instructions.

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Original Prusa MMU3 Enclosed (for CORE One) - Full Kit

Name: Original Prusa MMU3 Enclosed (for CORE One) - Full Kit
Price: 399.000000 USD
Availability: InStock

The Original Prusa MMU3 is our fast, efficient, and easy-to-use solution for printing with up to five filaments at the same time to produce beautiful, colorful prints. You can quickly turn any 3D object into a multicolored one in PrusaSlicer and EasyPrint!

Original Prusa CORE One 3D printer is not included in this product.

Select your MMU3 upgrade version

Online Manual, Handbook (EN) (change)

In stock

Preparation time: 1-3 business days.

In stock

$369

IDF: 987654321|IDS: 2964

Bring Color to Your 3D Prints!Original Prusa MMU3 for CORE One and CORE One+

Five filaments and fully automatic switching. The MMU3 is an optional upgrade that transforms your CORE One into a multi-color powerhouse: seriously fast, minimal waste, compatible with any filament spool. Now with a massive speed boost delivered via latest firmware update!

MMU3 at a Glance

The fastest single-nozzle multi-material solution on the market. Efficient, reliable, and with the March 2026 firmware update, it's even faster than before. Available in three configurations for every kind of user + options to run a fully enclosed or lite setup.

Colors at once

In a single print job, with one nozzle

~42 sec

Per filament swap

Roughly two times faster than similar solutions

73%

Less waste vs competitors

On PLA and PETG out of the box

Full Kit

Build your own MMU3

MMU3 available as an assembly kit.

Assembled

Factory-built unit

Faster installation, more convenient

Conversion Kit

From MK4S to CORE ONE+

When you already have an MMU3 unit.

What the community creates

Real prints from real CORE One + MMU3 users. No post-processing. No painting. Straight off the printer.

Mini Viking figurine with detailed multi-color armor and weapons

PRPrints_r_us

5-Color remix of Majora's Mask from Legend of Zelda, originally by 3DPrintDogs.

RARapterron

Spyro (Reignited Trilogy) MMU2S Remix by Rapterron - original files by jkavalik.

ICiczfirz

Deadpool Multicolour Remix by iczfirz. Original files by Eastman.

Articulated multi-color sea turtle with moving segments printed with MMU3

THThe Kit Card Guy

Print and build the legendary Ford GT 40 of the 60s, which has won several victories! 7.0l V8 goes wrooom!

MAMalte

This is an anatomically correct human heart. It is created as a multi material version: The heart's Ateries, Atrium, Valve, Ventricle, Papillary and Veins are a seperate file, so you can print a fancy multicolor heart.

PRPrusa Research

This model serves as a benchmark to test the quality, speed and waste of various multi color 3D printing solutions.

TATamás Szász

I could never figure out what the maps were indicating when i was little. So i made one that i would have been delighted with as a kid.

3D painting made easy

Paint your models with EasyPrint!

This is for everyone who wants to start printing with colors

Not all downloadable models are available as pre-painted, ready-to-print objects. However, with EasyPrint, you can quickly turn any single-color object into a colorful art piece. It runs in your browser or on your phone and it's completely free!

What changes when you add the MMU3

With the MMU3, you can print parts that do more, look better, and need less assembly.

MMU3 unit mounted on CORE One showing LCD status during a long multi-color print

Load five filaments. The rest is automatic.

The MMU3 has full two-way communication with your CORE One, so the entire system works as one. The printer knows exactly what the MMU3 unit is doing at any point and it can even recover from incorrect filament loading and other edge cases. Thousands of filament swaps happen fully automatically when you're not in the room.

Any 3D model, now in full color

Turning a single-color model into a five-color masterpiece takes only a couple of minutes in PrusaSlicer. Use the brush tool, smart fill, or bucket tool to paint your model. Then simply hit print. Or you can download one of thousands of pre-painted models from Printables.com.

Compact wipe tower next to a finished multi-color print showing minimal purged material

Engineered to waste less, not more

Competing multi-material systems often produce waste that weighs more than the finished print. The MMU3 goes the opposite direction: wipe-to-infill uses your object's own infill as a purge zone, wipe-to-object uses a second model, and the smart wipe tower is compact and partially hollow. The result: 73% less wasted filament than competitors in default settings.

Works with everything you already own

Giant 2 kg spools? The spoolholders handle them. Third-party filaments? Fully compatible. Unusual spool shapes? Download or design custom spoolholders - they're open source on Printables. No lock-in of any kind. The MMU3 works with whatever you're already printing.

Every filament change generates waste. But how much?

The multi-material secret nobody likes to talk about

Our solution is on the left. When your printer switches filaments, it needs to purge the remaining plastic from the nozzle. On most multi-material systems, it's a problem: large blobs of plastic (aka "filament poop") pile up next to the printer. On complex models, the amount of waste can actually weigh more than the finished object. That's cash in the trash. Our machines do not do that - instead, they purge a tiny amount of plastic into a compact block called Wipe Tower.

How PrusaSlicer helps save filament

Three convenient and easily-accessible features for saving filament and your money. Simply tick one box and you're ready to go.

Wipe Tower

A compact tower sits next to your print and collects the purged material from every color transition. Zero setup, fully automatic. Everything nice and tidy - no plastic scraps piling up around your printer.

Wipe to Infill

The printer will deposit purged filament into the infill of printed objects where you cannot see it - this means even less filament will be purged into the wipe tower. Greater savings, flawless results.

Wipe into Object

A second model on the build plate acts as the dedicated purge target. It absorbs every transition, soaking up all that mixed color filament. The result: your main model comes out perfect, and the second object turns into a cool, abstract mix of all your filament colors.

MMU3 Just Got Significantly FasterSave over 10 hours of print time!

Before the MMU3 passes the baton to the upcoming INDX system, we gave it one final, substantial upgrade. The latest firmware delivers a 20% improvement in filament swap speed, dropping from ~52 seconds to ~42 seconds per change. On a complex 5-color print with thousands of swaps, it means you'll save even 10 hours of print time.

Your multi-material prints arrive faster!

Major firmware update (March 2026)

The Lighthouse model is a stunning, complex print with 3,777 filament changes.

The new firmware update shaves off 9 seconds from every filament change. That is 33,993 seconds or 9,5 hours saved!

Read all about it in our blog post.

What actually happens during a color changeNot all printers handle this the same way

Every single-nozzle multi-material system has to solve the same problem: clean the nozzle between colors. The difference is in how clever (or expensive) that solution is.

Prusa MMU3

Smart ramming and stamping firmware keeps each individual purge minimal
Compact, partially hollow wipe tower stays contained and predictable - remove it at the end of the print
73% less waste than competing systems on PLA and PETG (default settings)
Three PrusaSlicer strategies can reduce waste even further
Works with any filament brand, any spool size

Competing systems

Purge filament into blobs ("poop") that drop next to the printer or into a bin you need to manage
You need to keep an eye on the bin with filament blobs and empty it even mid-print
The amount of purged plastic often weighs noticeably more than the finished print itself
100–200g of wasted filament per session is not unusual
Limited space inside enclosed systems means you need to choose spools carefully

The community has spoken

From stress tests to massive, complex prints with over 5.000 filament changes - these are real r/prusa3d community experiences.

DIDingoDanAmiibo

"About a month worth of printing and painting everything in PrusaSlicer. I truly love how reliable Prusas are!"

PUPunchDummy

"MMU3 Stress Test: Borderlands Ripper Mask. 115 hours printing. Over 5000 tool changes."

TPTPdesignwerkstatt

"Multi color functional prints are awesome."

THThe_Lutter

"This was my 2nd print using MMU3 after printing the 2-color benchy. Took about 2 hours and came out incredible."

DHdhernandeznater

"First big print on MMU3 with 0 interventions!!"

POpoozine

"156 hour MMU3 print 5 color print without a single intervention."

Enclosed or Lite - which is right for you?

Both versions use identical MMU3 hardware. The difference is entirely in how they mount to the CORE One and what that means for your workflow.

	MMU3 Enclosed	MMU3 Lite
Printer stays fully enclosed	✓ Yes — modified top cover included	✗ No — top panel removed
Installation time	Slightly longer - top cover needs replacing	Faster, the top remains open
Includes modified top cover	✓ Included	✗ Not included, can be purchased separately

Printer stays fully enclosed

MMU3 Enclosed

✓ Yes — modified top cover included

MMU3 Lite

✗ No — top panel removed

Installation time

MMU3 Enclosed

Slightly longer - top cover needs replacing

MMU3 Lite

Faster, the top remains open

Includes modified top cover

MMU3 Enclosed

✓ Included

MMU3 Lite

✗ Not included, can be purchased separately

Product Dimensions

How much extra space is needed?

	MMU3 Enclosed	MMU3 Lite
Printer (total dimensions with MMU3)	465×444×700 mm (width × depth ×height)	465×444×695 mm (width × depth ×height)
Spoolholders (recommended configuration)	600×300mm	600×300mm

Printer (total dimensions with MMU3)

MMU3 Enclosed

465×444×700 mm (width × depth ×height)

MMU3 Lite

465×444×695 mm (width × depth ×height)

Spoolholders (recommended configuration)

MMU3 Enclosed

600×300mm

MMU3 Lite

600×300mm

Everything you're wondering about the MMU3

Real questions, honest answers.

Most Affordable

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MMU3 Unit
Buffer
Spoolholders
CORE One with open top

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Fully enclosed

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MMU3 Unit
Buffer
Spoolholders
Top cover included

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MK4S->CORE One+ (Gen 2)

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Conversion kit parts
Print the plastic parts at home

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Original Prusa MMU3 Enclosed (for CORE One) - Full Kit

Bring Color to Your 3D Prints!Original Prusa MMU3 for CORE One and CORE One+

MMU3 at a Glance

What the community creates

Paint your models with EasyPrint!

What changes when you add the MMU3

Load five filaments. The rest is automatic.

Any 3D model, now in full color

Engineered to waste less, not more

Works with everything you already own

Every filament change generates waste. But how much?

How PrusaSlicer helps save filament

Wipe Tower

Wipe to Infill

Wipe into Object

MMU3 Just Got Significantly FasterSave over 10 hours of print time!

Your multi-material prints arrive faster!

What actually happens during a color changeNot all printers handle this the same way

Prusa MMU3

Competing systems

The community has spoken

Enclosed or Lite - which is right for you?

Printer stays fully enclosed

Installation time

Includes modified top cover

Product Dimensions

Printer (total dimensions with MMU3)

Spoolholders (recommended configuration)

Everything you're wondering about the MMU3

Which materials are supported?

There are a lot of MMU3 variants, which is the right for me?

Is the MMU3 compatible with my existing CORE One?

Do I have to use Prusa brand filaments?

How much time does a filament swap actually add to a print?

How much filament gets wasted during color changes?

Should I use a High Flow nozzle with the MMU3 for higher speeds?

Can I still print single-color with the MMU3 installed?

What's included in the full kit?

What happens if something goes wrong mid-print?

MMU3 Lite

MMU3 Enclosed

MK4 Conversion Kit

Reviews

Downloads