insulation tube of air conditioner&air conditioner pipe 1)Copper tube:OD:1/4,&3/8,&1/ ... air conditioner&air conditioner pipeTwin/pair insulated(isolated) copper tube/pipe Our product have got the CE certificate and pass the ... gases: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, ...