... , more than 100 sets in total;2) Material: iron, carbon steel, stainless steel, brass, copper, alloy steel, aluminum, ... steel with various plating; 3) Surface treatment: kinds of plating (Zinc, Nikel, Chrome, Tin, Ag); Painting, Powder, Anodizing, E- ... design & fabricating; 5) Inspection:Three lines of inspections before packing. Coating thickness tester, Roughness tester, Go /Ungo Gauge, Sault ...