brand new and high quality Features: The first layer is PEI film. Amber color, smooth surface, good adhesion to various printing materials, especially PLA and ABS, high temperature resistance of 260. The second layer is spring steel plate. Spring steel is a steel specially used to make springs and elastic elements. It has the ability of elastic deformation, which is difficult to permanently deform by for manpower. The magnetic base is made of soft magnetic rubber, soft in texture, and has good magnetism and temperature resistance. With 3-M adhesive, it can be directly attached to the hot bed platform. The surface adhesion is strong, no glue is needed, cold printing can be realized, and the bottom surface of the printed product is smooth. With the combination of magnetic steel, the steel plate can be bent lightly to take the mold easily. How to use? After apply the PEI sheet on our special spring stainless steel sheet, You can simply use 4 clips or magnets to hold it on the heatbed, then enjoy the printing. Easily remove 3D prints on printer by removing the spring steel plate, flexing it, and popping the print off. It's simple and makes the print removal process much easier. Specification: (The steel plate is 0.4mm thick, the PEI film is 0.15mm thick, and the soft magnetic rubber is 1.2mm thick) Type A: [Size] 220x220mm Weight399g Type B: [Size] 235x235mm Weight414g Type C: [Size] 310x310mm Weight765g Note: 1.No retail package. 2.Please allow 0-1cm error due to manual measurement. plz make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 Pc x PEI Sheet