... 3. High Precision, New Technology Product No./NameJJ-00010 / Aluminum baking tray used die casting proceed with teflon coating Manufacture Process1) Mould ... (white, blue, yellow, black)plating, hot galvanized, painting, Anodize, electrophoresis, sandblasting etc...6) Tolerance: +/- 0.0005inch, also accord with GB6414 Aluminum baking tray ...