Specification: Item Type: Double Sided Textured PEI Sheet Product Size: Approx. 450 x 450mm / 17.72 x 17.72in Application: 3D printer Product Material: PEI spray powder, spring steel, soft magnetic PEI Coating Thickness: Approx. Approx. 0.25mm / 0.01in Spring Steel Plate Thickness: Approx. 0.4mm / 0.02in Magnetic Rubber Plate Thickness: Approx. 1.2mm / 0.05in Overall Thickness: Approx. 2mm / 0.08in How to Use: Install and use directly. Package List: 1 x Spring Steel Build Plate 1 x Magnetic Rubber Plate Notice: 1. In order to maintain good bed adhesion, can be used to clean the after printing. 2. Refer to the material sheet for print settings.