Meterials: carbon steel, stainless steel, metal, brass, copper, zinc alloy, cold rolled steel with various ... plating Specification:1) Meterials: carbon steel, stainless steel, metal, brass, copper, zinc alloy, cold rolled steel with various ... hinge, binding, button, truss3) Surface treatment: kinds of plating (Zinc, Nikel, Chrome, Tin, Ag); Painting, Powder, Anodizing, E-coating, Silkscreen, ...