Pair/single insulated copper tube Our product have got the CE certificate and pass the Rohs test! 1,Copper tube:O.D.1/ ... 3/8''&3/4'',1/2''&3/4''2,Copper tube:thickness from 0.5mm to 1.5mm.3,Length: ... H3300 C1220T,EN12735-1, AS 15715,Thickness of copper tube compatible any gases:R22,R407C,R410A,R404A,R507C etc.6 ... absorption9,Insulation pipe can be printed with letter. Pair/single insulated copper tube