... parts - Zamac , Copper ,Aluminum, Zinc Stamping part :1.stamping material :steel ,aluminum,zinc,stainless steel ... zinc alloy, brass, gray iron,3.Process: investment casting, die casting, gravity casting, sand casting4.Machining: turning, milling, drilling, grinding ... PVC powder coating (enamel)6.Inspection: coordinate measuring machine, optical comparator, surface indicator, chemical element analysis, ...