PETG on the Prusa MK4S
Yes, easily. The MK4 with a high-flow brass nozzle. Same open frame, faster prints.
PETG prints great on the Prusa MK4S
Keep the spool dryMaterial
PETG soaks up moisture from the air, and damp filament prints rough and stringy. If that happens, dry the spool at 60-70 °C for 4-6 h and store it sealed with desiccant.
Buying the CF version of PETG?
Carbon-fiber filament sands down the Prusa MK4S’s stock nozzle. Plain PETG is fine; for the CF variant, fit a hardened steel nozzle first (a cheap swap).
Nothing special neededPrinter
The Prusa MK4S handles PETG without extra equipment. Load it and print.
Safe starting ranges for PETG as a family, not gospel. Each spool below has its exact manufacturer numbers, the dated source, and one-click slicer settings on its page.
Top PETG picks for the Prusa MK4S
Editor-tested spools and Prusa's own line: start here.
High-speed PETG at a budget price, tuned for the fast printers people actually own now.
The best first PETG to try after PLA: reliable adhesion, good layer bonding, and value pricing.
More PETG spools
290 PETG filaments in the catalog, popular brands first. See the full PETG list.