Description: PEI (Polyetherimide) , also known as Ultem, is a reusable, relatively maintenance free, perfect build surface for both ABS (with a Heated bed) and PLA (hot or cold), other materials such as Metal, Wood, ABS+ and many others also works just fine. PEI sheet is appealing due to its “no-surface-prep” conditions, which make it convenient to work with. Additionally, printing on PEI sheet requires no support rafts as parts adhere directly to the surface with no issue. Specification: Material: PEI/ULTEM 1000 Size: 157x157mm Thickness: 0.2 mm (0.001″) Light sanding with 600 grit and up will help increase the adhesion. This PEI sheet is Pre-applied with468MP Adhesive Transfer Tape for your convenience. Shipped With Stay Flat to Prevent Warping your precious PEI. 100% NO Bubble - 468MP Tape Machine Pre-applied!! Size Chart: Size:157mmx157mmx0.2mm/6.18x6.18x0.0078inch Package Includes: 1 Piece 157x157x0.2mm PEI Build Plate Note: The color may have different as the different display. Thanks for your understanding and finding this item. Please enjoy your happy shopping time！☺