Pre insulated copper tube/pipe Our product have got the CE certificate ... tube:O.D.1/4''&3/8'',1/4''&1/2'',1/4''&5/8'',3/8''&5/8'',3/8''&3/4'',1/2''&3/4''2,Copper tube ... R404A,R507C etc.6,PE insulation pipe:I.D.from Φ8 to Φ22.7,PE insulation pipe:thickness from 8mm ... to 10mm.8,Character:Anti-UV,good heat resistance,low water absorption9,Insulation pipe can be printed with letter. Pre insulated copper tube ...