Copper Clad Steel, Copper Cups, Brass Cups manufacturer / supplier in China, offering Gilding Metal Clad Steel (gmcs) Brass Steel Bullet Envelope Materials/Bimetallic Sheet Composite/Brass Clad Steel Belt/Copper-Steel-Copper/Brass Alloy, Gilding Metal Clad Steel Bimetallic Cups Composite Cartridge Cups Bullet Case Cups Copper Coated Steel Cups Bullet Casing, C22000/C26000/H90/H70 Bullet Shell Cartridge Case of Brass Cups/Copper Clad Steel Cups/Bullet Case Cups/Copper Coated Steel Cups and so on.