... steel, Aluminum, Phosphor Copper, Brass, etc. (According to customer's demands)2. Surface finish: Zinc, Nickel, Chrome, Tin, Silver ... , Anodizing Heat treatment, Black Oxid(According to customer's demands)3. Process is generally punching, cleaning and ... mirror heating defrost, electric motor, water heater tube, cartridge heater tube, temperature controller precision hardware, motor controller PCB ...