... quality surface treatment 5.Bit Tolerance Aluminum Alloy Die casting 1.Material: Aluminum alloy elements as follows: 2.Process ... machining, milling, drilling, griding, etc.;4.Finishing:electrophoresis,polishing,plating,anodizing,painting,powder 5.Packing:plastic bag+ carton ... Production services 3. Secondary machining 4.Surface treatment (Tumbling, Polishing, Tapping, Sandblasting and so on) 5. OEM & ...