The plate is 12 inch square 0.8mm thick with a protective layer on both sides.
PEI (Polyetherimide), its trade name is Ultem, is a high temperature plastic perfect for beds for FFM printers. This bed material is reusable for a maintenance free printing. The PEI works with ABS, PLA, HIPS, PET+, Brick, Wood & Flexible (TPE/TPU) filaments.
To clean the bed before each print use isopropyl alcohol, this will clean off any fingerprints and greasy residue.
This product can be easily cut to suit your bed size.