... ,DIN,UNI,GB6,Material:low carbon steel tube7,Copper plated or Zinc plated8,Wall thickness:0.5mm~0.7mm9Outer ... Bundy Tube1,Standard:ASTM,DIN,UNI,GB 2,Copper plated,Zinc plated 3,Material:low carbon steel tube O.D(mm ... )Thickness(mm)3.180.74.000.74.760.75.000.76.000.76 ... .350.77.940.78.000.79.530.710.000.712.000.712.700.7 copper-plated bundy ...