Package includes: 1Pcs prusa 3d printer mk52 spring steel plate for 3D Printer MK2.5 MK3 MK3S MK3S+ MK4( double printing side) 2019 New Upgrade for 3D Printer Print Bed, with Prusa MK4 MK3 MK3S+ Size: about 10 x 9.4 inch Double-sided PEI -coated plate made of hardened flexible steel, does not deform Easy to install, prints release easily by bending the plate. Usable for many types of filament such as PLA, ABS, PETG, TPU, PUA etc. Printers without automatic print bed adjustment can be upgraded to ABL by installing an inductive Z-probe : if the product does not work, we will replace or it. If you have any further questions, please read our Q&A or send an . Our staff and technicians will be happy to help you.