1.stainless steel hinge 2.finish:Hot Dip Galvanized,Stainless Steel 3.All size can be available. We ... total;2) Material: iron, carbon steel, stainless steel, brass, copper, alloy steel, aluminum, cold rolled steel with various plating; 3) Surface treatment: ... , Heat treatment, Black oxid; 4) Standard/ specification: OEM service as per customers' requests, with in-house tooling design & fabricating ...