copper coated steel tube bao steel strap low carbon,widely used refrigeration,freezer etc also passed ISO9001 quality system. copper coated steel tube,1)material:bao steel strap,low carbon;2)outer diameter:4.00mm,4.76mm,6.35mm,8.00mm;3)wall thickness:0.50mm,0.60mm,0.65mm,0.70mm;4)standard:ASTMA-254;5)certification:also passed ISO9001 quality attestation system;6)packing as customer's request;7) ...