... tube),stainless steel,copper ,brass,aluminum,etc4.Finish:zinc plated,chromated plated, Electrophoresis, Dacromet ,powder painting ... customer's requirements)Surface Treatment hot galvanized, polishing, Zinc-plated, nickel-plated, chrome-plated, silver-plated, ... .UsageAll kinds of cars, machinery, home appliance, electronic products, electric appliance, stationery, computers, power switches, miniature ...