... ,according to customers' drawings or samples.3).Materials: Stainless steel ,cold work steel ,spring steel ,aluminum alloy,brass, bronze,copper, plastic ,according ... ,electro-polishing,powder coating and painting according to customer's requirements.5).High quality control.100% inspection before shipping ... .002ID/OD Grinding 0.002Wire-Cutting 0.002 Stainless steel cnc precision machining products