... die cast for high-end microphone cover with double plating Manufacture Process1) Mould/Tooling analysis, design ... , polishing, cleaning, finishing, passivation, including infiltration & double plating6) Full Inspection7) PackingProduct Description1) Material: Aluminum alloy2 ... yellow, black)plating, hot galvanized, painting, Anodize, electrophoresis, sandblasting etc...6) Tolerance: +/- 0.0005inch, also ...