... , iron, brass, aluminum, zinc alloyMachining methodTurning, Milling, Drilling, threading, stampling, punching etc..Surface finishChrome plating, zinc plating, blackening, ... Application Mobile phone, audios, glasses, surgical instruments, precise tools.RemarksAll parts are not in stock, customization only!Any ... forward to our Win-Win Cooperations!! auto lathe stamping parts flat steel shim washer