... 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 tubeO.D(mm)Thickness(mm)3.180 ... system2,Standard:ASTM,DIN,UNI,GB3,Material:low carbon steel tube4,Copper plated or Zinc plated5,Wall thickness:0.5mm~0.7mm6 ...