... ,UNI,GB Copper plated,Zinc plated Material:low carbon steel tube CE Specification:steel bundy tubeφ4.76mm× 0.7±0.01mm1φ6.00mm ... .4.76mm,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 use ...