4 Axis CNC machining aluminum precision parts Material: Aluminum,brass ,steel Tolerance:+0.005/-0.005 ... steel ,spring steel ,aluminum alloy, brass, bronze, copper, plastic ,according to customer request4).Finish: Anodizing ,plating, electro-polishing, powder ... /Shipment Terms/Lead time):TypePrecision CNC machining partMaterials:Aluminum alloyMaterial GradeGB,ASTM,AISI,DIN,BS,JISProcessPrecision CNC ...