... ,4,6,7,10, Copper Tube for Air ConditionerTwin/pair insulated(isolated) copper tube/pipe Our product have got the ... CE certificate and pass the SGS test!1,Copper tube ... ''&3/4'',1/2''&3/4''2,Copper tube:thickness from 0.5mm to 1.5mm.3, ... /17791--1999,JISH3300,ASTM B7435,Thickness of copper tube compatible any gases:R22,R407C,R410A,R404A,R507C ...