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 ... is needed to connect pipe insulation, and to improve the air conditioner's energy efficiency, should further improve the connection pipe insulation ... same design pressure are 13.0Mpa, 13.0Mpa is the air pipe system 3 times the maximum working pressure, so the use ...