... Description 1,Copper tube:O.D. 1/4'',3/8'',1/2'',5/8'',3/4'',7/8'',1'',1.1/8'',1.1/4'',1.1/2''2,Copper tube:thickness from 0.5mm to 1.5mm ... .3,Length: 3 meters to 30 meters4,Standard complied: GB/17791--1999,JISH3300,ASTM B7435,Thickness of copper tube compatible ...