1.Standards:GB/T12769-2003 2.Base:Cu(T2,TU2),AL,etc. 3.D:(8~80)mm 4.lots shapes of bending, punching, and welding We offer all kinds of OEM services.and export products to Africa, North America, South America, Southeast Asia and West Europe. We have established long-term, stable and good business relationships with many manufacturers and wholesalers around the world. 1.Standards:GB/T12769-20032. ...