... design team. 2. material: steel , steelness steel, Iron,Aluminum.3.Surface: Galvanized ,Oxidative and painted.4.Size: According to customer's ... Bending,Tig Welding,Mig Welding,Riveting, Grinding,Stamping, Assembling,etc. Surface treatment: Powder coating,Hot galvanized,Painting,Polishing,Brushing,Cataphoresis,Chrome/Zinc ...