... 3.Over 20 years experience cold rolled metal stamping electric motor, made by the way of progressive stamping, and ... then do the surface finish.Application: auto, electric appliance (household), computer, furniture, industry, agriculture.Product range: ... Materials: Iron, stainless steel, brass, copper, alloy steel, aluminum,etc.Surface finish:Polishing, Plating (Zinc, Nickel, Chrome,etc), ...