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 fitting Copper Tube for Air ConditionerTwin/pair insulated ... ,R410A,R404A,R507C etc.6,PE insulation pipe:I.D.from Φ8 to Φ22.7,PE insulation pipe:thickness from 8mm to 10mm.8 ...