... 1.part material :steel ,stainlees stell 2.finish:coating , galvanzied ,polisehd Customerized steel precision stamping part/metal ... polished, Zinc plated, nickel plating, chrome plating, powder coating, e-coat, HDG, black anodizing. Mould designed in ... threading, welding, polishing, assembly.Inspection:Coating thickness tester, roughness tester, Go/Not-go gauge, salt spray testing, and hardness check ...