... NameJJ-00092 / Aluminum die cast for high-end microphone cover with double plating Manufacture Process1) Mould/Tooling analysis, design & manufacturing2) ... Zamak 4, Zamak 5, Zamak 12; Aluminum 6061, 6063, 7075; (Plastic: ABS, PC, PS, PP, PVC, TPR, TPU, TPE, HDPE ... , sandblasting etc...6) Tolerance: +/- 0.0005inch, also accord with GB6414 Aluminum die cast for microphone part with double plating