Double-sided textured PEI powder-coated spring steel sheet for the Original Prusa i3 MK3/S and MK2.5/S.
WARNING:
Never clean the Textured PEI Powder-coated spring steel sheet with acetone! Doing so will create microfractures in the PEI texture, which will make the surface deteriorate over time. See the Prusa.com website for more information.