Prusa
What filaments work in the Prusa MMU?
First in this ranking: Prusament PLA.
- Nozzle205–225 °C(401–437 °F)
- Bed40–60 °C(104–140 °F)
- Speed—
- Dry45 °C(113 °F)for 6 hManufacturer drying table →
- Density1.24 g/cm³
Drying. Source: Prusament TDS · Last checked 18 October 2026
Source: Prusament product page · Last checked 19 October 2026
Ranked filaments
| Rank | Filament | Material | Nozzle | Bed | Datasheet | Buy |
|---|---|---|---|---|---|---|
| 1 | Prusament · PLA | PLA | 205–225 °C (401–437 °F) | 40–60 °C (104–140 °F) | — | |
Prusament PLA lists a nozzle of 205–225 °C (401–437 °F) and a bed of 40–60 °C (104–140 °F). Both sit under the MK4S maxima of 290 °C (554 °F) and 120 °C (248 °F). The MK4S record lists MMU3 as optional and a brass CHT nozzle. | ||||||
| 2 | Prusament · PETG | PETG | 240–260 °C (464–500 °F) | 70–90 °C (158–194 °F) | Datasheet | |
Prusament PETG technical data sheet lists 240–260 °C (464–500 °F) and a bed of 70–90 °C (158–194 °F). Drying on the row is the Prusa material guide, 55 °C (131 °F) for 6 h. The MMU threads do not publish a PETG tip temperature. | ||||||
| 3 | Polymaker · Polylite PLA | PLA | 190–230 °C (374–446 °F) | 25–60 °C (77–140 °F) | Datasheet | |
PolyLite PLA lists 190–230 °C (374–446 °F), a bed of 25–60 °C (77–140 °F), and drying at 55 °C (131 °F) for 6 h. It fits the MK4S nozzle and bed. It is a catalog PLA with a datasheet, not a spool named in the MMU threads. | ||||||
| 4 | SUNLU · PLA | PLA | 190–230 °C (374–446 °F) | 50–70 °C (122–158 °F) | — | |
SUNLU PLA lists 190–230 °C (374–446 °F) and a bed of 50–70 °C (122–158 °F), with drying at 50–55 °C (122–131 °F) for 8 h from the SUNLU wiki. Same fit on the MK4S. The threads do not name SUNLU. | ||||||
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The MMU3 path in these threads is for ordinary rigid filament. TPU is the material the practical reply takes out of the path.
PLA and PETG on an MK4S with MMU3
The MK4S stores a 290 °C (554 °F) nozzle, a 120 °C (248 °F) bed, a brass CHT nozzle, and optional MMU3. Prusament PLA lists 205–225 °C (401–437 °F) and a bed of 40–60 °C (104–140 °F). Prusament PETG lists 240–260 °C (464–500 °F) and a bed of 70–90 °C (158–194 °F). PolyLite PLA lists 190–230 °C (374–446 °F) and a bed of 25–60 °C (77–140 °F). SUNLU PLA lists 190–230 °C (374–446 °F) and a bed of 50–70 °C (122–158 °F). What the MK4S and CORE One+ can hold is on MK4 filament. The Bambu hub is a different machine: AMS filaments.
r/prusa3d 1clmrgl is single-filament mode. The score-10 reply leaves the MMU connected and selects one slot, because the MMU waits until the nozzle is at temperature. A score-2 reply says the scrap piece is the length of the front PTFE tube. That length is the comment.
TPU
r/prusa3d 1f64oe3 asks how people print TPU on the MMU3. The score-10 reply disables the MMU3, pulls the bowden, and prints as a plain MK4. A score-9 reply has run Ninjaflex through an MMU3 while watching the start. Ninjaflex is not a catalog product. A score-3 reply wants a different support material because TPU supports are hard to remove. TPU temperatures live on the flexible-filament pages, not as an MMU ranking here.
Threads that are not a filament list
r/FixMyPrint uitndx is dark-to-light bleeding on an MMU2S. The score-96 reply is a Kenny joke. This page does not take a purge number from that thread.
r/prusa3d 139j5ic explains the second spool in Prusa photos. The score-90 reply is a manual swap. A score-37 reply changes filament at a layer for signs. That workflow is on multicolor printing.
r/prusa3d 12bjj46 is a buffer that grinds filament. The poster uses 3 mm ID bowden and a straight section before the MMU. Replies talk about drag on the wheel. PLA and PETG are the material pages. Prusament is the brand index.
Pros and cons
Pros
- PLA and PETG are ranked because the MK4S can hold their listed temperatures and the single-filament replies keep the MMU in the path.
- TPU is described the way the MMU3 thread describes it: bypass the unit.
Cons
- r/FixMyPrint uitndx is dark-to-light purge on an MMU2S. The top comments are South Park jokes, so this page takes no purge volume from them.
- A score-9 reply has babysat Ninjaflex on an MMU3. Ninjaflex is not a catalog id, and this page does not turn that reply into a TPU-on-MMU setting.
Printer considerations
- The MK4S product page lists a 290 °C (554 °F) nozzle, a 120 °C (248 °F) bed, a Nextruder direct drive, a brass CHT nozzle, and an enclosure that is not included. MMU3 is optional.
- Single-filament mode is a score-10 reply on r/prusa3d 1clmrgl. Select the slot in the slicer. A score-2 reply says the scrap piece is the length of the front PTFE tube. That length is the comment, not a Prusa specification.
- r/prusa3d 12bjj46 is buffer drag and grinding. The poster says they use 3 mm ID bowden and a straight section before the MMU. That is the poster's tubing, not a filament.
What the community says
r/FixMyPrint uitndx asks for help going from dark filament to white on an MMU2S on an i3 MK3S+. The post is deleted. The score-96 reply is a Kenny joke, and the next replies continue it. r/prusa3d 139j5ic asks why official photos show two spools on printers that need an MMU for multi-material. The score-90 reply says the holder has room for two spools and that you can swap by hand. A score-37 reply uses the second spool to change filament at a layer for signs. A score-29 reply does the same for two-color prints. r/prusa3d 1f64oe3 asks how people print TPU on the MMU3. The score-10 reply bypasses the MMU3, disables it, removes the bowden, and prints as a plain MK4. A score-9 reply babysits Ninjaflex at the start. A score-3 reply wants TPU supports and finds them hard to remove. r/prusa3d 1clmrgl asks what to do with an MMU3 on mostly single-filament jobs. The score-10 reply leaves it in the path and picks one slot. A score-8 reply uses spool-join. A score-2 reply says the scrap equals the front PTFE tube. r/prusa3d 12bjj46 is a buffer that reintroduced grinding. Replies talk about wheel drag, a straight tube into the MMU, and 3 mm ID bowden.
- Community source, r/FixMyPrint uitndx
- Community source, r/prusa3d 139j5ic
- Community source, r/prusa3d 1f64oe3
- Community source, r/prusa3d 1clmrgl
- Community source, r/prusa3d 12bjj46
Sources & notes
Accessed 20 October 2026.
- Prusament PETG technical data sheet datasheet
- PolyLite PLA technical data sheet datasheet
- Original Prusa MK4S manufacturer
- SUNLU filament wiki manufacturer
- Community source, r/FixMyPrint uitndx reddit
- Community source, r/prusa3d 139j5ic reddit
- Community source, r/prusa3d 1f64oe3 reddit
- Community source, r/prusa3d 1clmrgl reddit
- Community source, r/prusa3d 12bjj46 reddit
Related questions
- How do I print multicolor / which filaments work together?AMS
- Which filaments work in the Bambu AMS?AMS
- What filaments can the Prusa MK4/Core One/Mini print?Prusa
Questions
Should TPU run through the MMU3?
The score-10 reply on r/prusa3d 1f64oe3 says no for a single-material TPU print. Disable the MMU, remove the bowden, and print as a plain MK4. The same reply has no advice for a multi-material TPU job.
What purge volume does the MMU2S thread recommend?
None. The post is deleted, and the highest-scored comments are jokes about Kenny. This page does not publish a purge volume or a tip-forming temperature.