steel bundy tube Standard: ASTM,DIN,UNI,GB Copper plated,Zinc plated Material:low carbon steel tube CE Specification:steel bundy tubeφ4.76mm× 0.7± ... 76mm,6mm,6.35mm,8mm copper coated bundy tube,condenser tube,copper coated steel tube2.different models avalable3.76mm,6mm,6. ... 35mm,8mm copper coated bundy tube bundy tube,condenser tub.bundy pipe,copper coated steel tube, copper coated bundy tube4,Main ...