... No./NameJJ-00092 / Aluminum die cast for high-end microphone cover with double plating Manufacture Process1) Mould/Tooling analysis, design ... polish, powder coating, Chrome/Nickel/Zinc(white, blue, yellow, black)plating, hot galvanized, painting, Anodize, electrophoresis, sandblasting etc...6) Tolerance ... 0.0005inch, also accord with GB6414 Aluminum die cast for microphone part with double plating