... Product No./NameJJ-00092 / Aluminum die cast for high-end microphone cover with double plating Manufacture Process1) Mould/Tooling ... to 1250T. 5) 27 product lines of post processing facilities with CNC machining, turning, milling, tapping, drilling, polishing, punching ... etc.5) Surface Treatment: High quality polish, powder coating, Chrome/Nickel/Zinc(white, blue, yellow, black)plating, hot galvanized, ...