... 4,6,7,10, air conditioner copper pipe Twin/pair insulated(isolated) copper tube/pipe Our product have got the CE certificate and ... :R22,R407C,R410A,R404A,R507C etc.6,PE insulation pipe:I.D.from Φ8 to Φ22.7,PE insulation ... pipe:thickness from 8mm to 10mm.8,Character:Anti-UV, ... good heat resistance,low water absorption9,Insulation pipe can be printed with letter.