Describe:The CNC machining process usually get good tolerance(usually +/-0.02mm) and surface roughness performance(Ra 1.6). CNC machining(turning/3,4,5 axis milling/WEDM)Brass H59,H62,H63,H65,H68,H70,H80,H85,H90,H96.. etc.A variety finish ranges from polishing to brushing to nickel plating.