insulation tube of air conditioner&air conditioner pipe 1)Copper tube:OD:1/4,&3/8,&1/2,&5/8,&3/4, (2) Length:3,4,6,7,10m insulation tube of air conditioner&air conditioner pipeTwin/pair insulated(isolated) copper tube/pipe Our product have got the CE certificate and pass the SGS test!1,Copper 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:thickness ...