... hinge 2.finish:Hot Dip Galvanized,Stainless Steel 3.All size can be available. We can design ... sets in total;2) Material: iron, carbon steel, stainless steel, brass, copper, alloy steel, aluminum, cold rolled steel with various plating; 3) Surface treatment: ... before packing. Coating thickness tester, Roughness tester, Go /Ungo Gauge, Sault spray testing machine, Hardness tester 6) OEM/ODM service ...