air conditioning pipe insulation&a/c fitting 1)Copper tube:OD:1/4,&3/ ... /4, (2) Length:3,4,6,7,10, air conditioning pipe insulation&a/c fittingCopper Tube for Air ConditionerTwin/pair insulated(isolated ... :Anti-UV,good heat resistance,low water absorption9,Insulation pipe can be printed with letter. air conditioning pipe insulation&copper tube for air conditioner