Made of high-quality spring steel, the flexible Steel PEI Sheet won't kink or warp when flexing. It can stick well to the magnetic base, can be resistant to 200°C of the nozzle, and has high strength and no deformation. The Soft Magnetic Sticker can withstand a long time of work with the heated bed at a high temperature of 70°C. Easy to adhere the filaments to the printing bed. No need for tape and glue which releasees your printing anxiety. Easy to remove the prints just take out the PEI sheet and slightly flex it repeatedly to pop your prints right off. The PEI Printing Surface can compatible with PLA?PETG?PEEK?ABS and any other filaments. Perfect printing size works well with Creality Ender 3 S1/Ender 3 S1 Pro/Ender 3/ Ender 3X/Ender 3 Pro/Ender 5/Ender 5 Pro.