... 3).Materials: Stainless steel ,cold work steel ,spring steel ,aluminum alloy,brass, bronze,copper, plastic ,according to customer request4).Finish ... Terms/Shipment Terms/Lead time):Typecnc machining products Materials:Aluminum alloyMateial GradeGB,ASTM,AISI,DIN,BS,JISProcessPrecision cnc machiningTolerance:0 ... .002ID/OD Grinding 0.002Wire-Cutting 0.002 golden anodized aluminum cnc machining products