... Pre insulated copper tube(pipe) Our product have got the CE certificate and pass the Rohs test! 1,Copper tube:O. ... /8''&3/4'',1/2''&3/4''2,Copper tube:thickness from 0.5mm to 1.5mm. ... H3300 C1220T,EN12735-1, AS 15715,Thickness of copper tube compatible any gases:R22,R407C,R410A,R404A,R507C ... good heat resistance,low water absorption9,Insulation pipe can be printed with letter. Insulated copper pipe(tube)