Air Conditioner tube 1)Copper tube:OD:1/4,&3/8,&1/ ... /8,&3/4, (2) Length:3,4,6,7,1 Air Conditioner tube(1)Copper tube:OD:1/4,&3/8,&1 ... achieve cooling pipe The cleaning requirements.4, good insulation properties: air conditioning is needed to connect pipe insulation, and to improve the air conditioner ... is easier to install and transfer machines. copper-aluminum tube & Air Conditioner tube