... the CE certificate and pass the Rohs test! 1,Copper tube:O.D.1/4''&3/8'',1/4''&1/ ... 3/8''&3/4'',1/2''&3/4''2,Copper tube:thickness from 0.5mm to 1.5mm.3,Length: ... AS 15715,Thickness of copper tube compatible any gases:R22,R407C,R410A,R404A,R507C etc.6,PE insulation pipe:I.D.from ... :Anti-UV,good heat resistance,low water absorption9,Insulation pipe can be printed with letter. Insulated copper pipe(tube)