Smooth PEI Surface for Flat Model Surface PEI is Wear-resistant and High-temperature,Resistant with Stable Performance High-strength Spring Steel Plate,Not Easy to Deform Easy to Remove Printed Models Strong Magnetic Force,Not Easy to Dislocate Thoughtful Design,Finer Details Compatible with: K1, Ender-3 S1, Ender-3 S1 Pro, Ender-5 S1 Size: 235×235mm