... Tube: 1.Steel bundyTube 2.Copper Coated Steel Tube 3. Steel brake Bundy Tube 4.copper coated brake Bundy Tube Copper coated steel brake Bundy Tube Copper coated steel ... brake Bundy Tube1,Standard:ASTM,DIN,UNI,GB 2,Copper plated,Zinc plated 3,Material:low carbon steel ... system2,Standard:ASTM,DIN,UNI,GB3,Material:low carbon steel tube4,Copper plated or Zinc plated5,Wall thickness: ...