... ) Mould/Tooling testing & confirm the sample3) Die-casting rough parts4) Machining: drilling, grinding etc5) Surface treatment: Trimming, polishing, cleaning & Electroplating gold-cupreous6) Full ... /Zinc(white, blue, yellow, black)plating, hot galvanized, painting, Anodize, electrophoresis, sandblasting etc...6) Tolerance: +/- 0.0005inch, also accord with GB6414 Zinc alloy die casting ...