... quality control systemMaterial:Steel, stainless steel, aluminum, zinc, copper, brass, plastic etcMachining process:CNC machining, milling, turning, drilling, planning, welding ... , laser cuttingSurface treatment:Polishing, chrome/zinc/nickel plating, power coating, anodize, E ... CAD (IGS, STP, STL and X-T) Precision Aluminum Machining parts