... , (2) Length:3,4,6,7,1 Air Conditioner tube(1)Copper tube:OD:1/4,&3/8,&1/2,&5/8,&3 ... of solder joints, leading to leakage of tube wear eye.Third, high cleanliness: as between copper and aluminum pipe without welding, but ... to install, move machine: aluminum than brass soft, copper-aluminum connecting pipe copper tube design is 1.5 times the wall thickness, not ...