... Split Air conditioner insulated copper tube ,ASTM Twin Type Insulated Copper Tube for Air Conditioner specificatondiameter of ... )8mmDouble embossed film1.copper tube:O.D.1/4''&3/8'',1/4''&1/2'',1/4''&5/8'',3/ ... 6.Character:Anti-UV,good heat resistance,low water absorption7.Insulation pipe can be printed with letter ... hard skin, middle insulation sheet and inner insulation tube.9. Two ends of 3M-10M air ...