... Stainless steel, iron , white brass , aluminium, Steel ,Zinc etc .Machining methodlathe turning, cnc turning, milling, threading, etcSurface finishPolishing , chrome, nickel plating, zinc ... 3.Send the parts by express, 3~5 days door to door service.ApplicationOptical products, Electronics products, Surgical instruments,LED, ... to our Win-Win Cooperations!! Precision machinery copper door hardware parts