... ,grinded,polished. 4.Tolerance:+/_0.01mm Milling parts & CNC machining parts 1,Material: Brass, Copper, Stainless steel, Carbon steel, ... Aluminium etc 2,Machining process: CNC turning, Milling, Drilling, CNC lathe etc 3,Surface treatment: Plating with Zinc ... according client's requirement Please send us drawings or samples for free quoting. machining parts