precision auto part -1. auto refitting part;2. mat'l: sand casting ductile, grey iron, or steelwe make high quality with reasonable prices.Material:Aluminum, Steel, Stainless steel, Aluminum alloy,Brass, etc. Surface Treatment:Polishing, Anodizing, Powder coating, Spraying, Zinc Plating and etc. Tolerance +/-0.002~0.05mm Equipments a) CNC..