Prusa Core One Build Plate: The 254 by 241 mm Sheet, and Which Replacements Fit
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The Prusa Core One takes a steel sheet about 254 by 241 mm, the same size and locating pins as the MK4S, MK4 and MK3S sheets, so those plates fit. Buy a textured PEI sheet for PETG and most work, a smooth PEI sheet for glossy PLA, and consider Prusa’s satin sheet as the all-rounder. The Core One is enclosed, so ABS and ASA work on a textured or satin sheet without glue.
Prusa kept the MK4 sheet size for the Core One, which means the large third-party market of MK4-compatible sheets carries straight over. The Core One adds an enclosure, so its sheets see ABS and ASA far more often than an MK4’s do; that pushes the choice toward thick textured or satin coatings that survive 100 °C bed cycles.
Where to buy
What to check
- Listed for the Core One or MK4 family, about 254 by 241 mm with the two rear locating pin holes. Plates for other printers do not fit.
- Spring steel 0.5 mm or thicker so the plate stays flat on the magnets.
- Coating thickness stated; the enclosed Core One runs ABS and ASA at bed temperatures that wear powder coat faster than PLA does.
- Double-sided if you want smooth PEI as well as textured on one sheet.
Surface by material
- PLA: textured or smooth PEI, 55 to 60 °C.
- PETG: textured PEI, 70 to 80 °C; smooth PEI only with a glue-stick release layer.
- TPU: textured PEI, 40 to 50 °C.
- ABS and ASA: textured or satin PEI at 95 to 105 °C with the chamber warmed; smooth PEI with glue stick. Lifting on a warm Core One means a greasy sheet.
The plates in the box
The upgraded double-sided PEI plate for the Core One and the 254 by 241 mm Core One plate are the direct replacements; the two-pack listed for the MK3, MK3S+, MK4 and Core One fits all of them and is the economical way to keep a spare.
Swapping
- Wash the new plate with dish soap and hot water; dry; handle by the edges.
- Seat it against the rear stop on the magnetic bed.
- Run the printer’s auto-leveling so it measures the new plate; smooth and textured differ by a couple of tenths in Z.
- If the first layer will not stick, wash again before changing anything; see smooth versus textured.
FAQ
Do MK4S sheets fit the Core One? Yes; same size and pins.
Textured, smooth or satin? Textured for PETG and ABS, smooth for glossy PLA, satin as one sheet that does most things.
Do I need glue for ABS in the Core One? Not on textured or satin with the chamber warm.
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