... 3).Materials: Stainless steel ,cold work steel ,spring steel ,aluminum alloy,brass, bronze,copper, plastic ,according to customer request4). ... Terms/Lead time):Type Precision cnc milling part Materials:Aluminum alloyMateial GradeGB,ASTM,AISI,DIN,BS,JISProcessPrecision CNC machiningTolerance: ... 005Grinding0.002ID/OD Grinding 0.002Wire-Cutting 0.002 High quality aluminum CNC machining precision parts