double wall copper coated precise steel tube

1)material: bao steel strap, low carbon;

2)outer diameter:3.18mm,4.0mm,4.76mm,6.35mm,8mm;

3)wall thickness:0.5mm,0.6mm,0.65mm,0.70mm,1mm;

4)standard:ASTMA-254;

5)certification:also passed ISO9001 quality atttestation system;

6)competitive price among the same area.