... :3,4,6,7,10m insulation tube of air conditioner&air conditioner pipeTwin/pair insulated(isolated) copper tube/pipe Our product have got the ... CE certificate and pass the SGS test!1,Copper tube:O ... Standard complied: GB/17791--1999,JISH3300,ASTM B7435,Thickness of copper tube compatible any gases:R22,R407C,R410A,R404A,R507C etc.6 ...