Pair/Single Pre insulated copper tube(pipe) Our product have got the CE certificate and pass ... :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. Insulated copper pipe(tube)