... , ROHS standard 4,Material : Selected 5:Design : Selected High-quality Precision Hardware Parts Products Pictures : Specifications : Product TypeHigh-quality Hardware PartsMaterialsteel alloy ... , Stainless steel, iron , white brass , aluminium, Steel ,Zinc etc .Machining methodlathe turning, cnc turning, milling, threading, etcSurface finishPolishing , chrome, nickel plating, zinc ...