... and OEM service 4.High QC standar Custom Color zinc plating metal stamping Specifications1.for more than 8 ... hardening clear anodizing, chrome plating, nickel plating, zinc plating, oil injection, black oxide coating and so onmaterialstainless steel, iron ( SPCC, ... SECC, SPTE, tinplate), aluminum alloy, red copper,brass, bronze finish Zinc/ ...