... got the CE certificate and pass the SGS test! 1,Copper tube:O.D. 1/4'',3/8'',1/2'',5/ ... 1.1/8'',1.1/4'',1.1/2''2,Copper tube:thickness from 0.5mm to 1.5mm.3,Length: ... ,ASTM B7435,Thickness of copper tube compatible any gases:R22,R407C,R410A,R404A,R507C etc.6,PE insulation pipe:I.D.from ... ,Character:Anti-UV,good heat resistance,low water absorption9,Insulation pipe can be printed with letter. Copper Tube