... Metal punching parts 2.Zinc Plating 3.Professional mould design,OEM is ok. 4.Certification:IS09001 Metal punching parts1.Many years exerience in metal ... steel),stainless steel,copper,brass,aluminum,etc4.Finish:zinc/chrome/nickel plating,electrophoresis paint,powder coating ,anodize,etc5.Usage ... and alloy steel ,ect.Now the advanced drainage ditch & metal gratings are very hot made in our factory. If ...