... workmanship 3.rich experience 4.OEM &ODM service round extrusion product- OEM Materialcarbon steel, stainless steel, ... steel tube, steel rod, aluminium , brass, zinc alloy and etc.Processstamping, bending, welding, casting, punching, ... machingSurfacepowder coating, zinc plated, nickel-chrome plated, painting, heat treatment and ...