... OEM service is welcomed.5. Material: cold rolled steel,stainless steel,galvanized steel,copper ,brass.6. Equipment: 25-400ton punching machine ... , assembly line, cold punching line. More than 1600 advanced machines for punching, turing, milling, maching, weld, galvanizing, heat ... good supplier, our company's policy is: supply high quality products at most competitive prices to meet customers' need.