air conditioner copper pipe 1)Copper tube:OD:1/4,&3/8,& ... /8,&3/4, (2) Length:3,4,6,7,10, air conditioner copper pipe Twin/pair insulated(isolated) copper tube/pipe Our ... to 1.5mm.3,Length: 3 meters to 30 meters4,Standard complied: GB/17791--1999,JISH3300,ASTM B7435,Thickness of copper ...