We can supply copper tubes, insulation pipes and installation accessories 1,Copper tube:O.D.1/ ... any 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, ... good heat resistance,low water absorption9,Insulation pipe can be printed with letter. Insulated Tube Sets