... : Aluminum, Aluminum alloy, stainless steel, Copper, Carbon steel, Bearing steel, Tungsten Steel, Brass,Plastic and Bakelite2) Surface Treatment: Zinc/nickel/chrome plating,hot galvanized, painting, powder ... , hot galvanized, painting, Anodize, electrophoresis, sandblasting etc...6) Tolerance: +/- 0.0005 inch, also accord with GB6414 CNC machining, CNC machining part, stainless steel ...