Air Conditioner tube 1)Copper tube:OD: ... (2) Length:3,4,6,7,1 Air Conditioner tube(1)Copper tube:OD:1/4,&3/ ... comprehensive specifications. Copper-aluminum connecting pipe in air conditioning manufacturing, air conditioning maintenance is the application.A long ... cleaning requirements.4, good insulation properties: air conditioning is needed to connect pipe insulation, and to improve the air conditioner ...