Split Air Conditioner Insulated Copper Tube Length:3m ~ 50m Thickness :0.5mm,0.65mm, ... .75mm,0.80mm,0.90mm Split Air conditioner insulated copper tube ,ASTM Twin Type Insulated Copper Tube for Air Conditioner specificatondiameter of ... copper nuts. Welcome to inquiry . Best RegardsCathy Split Air Conditioner Insulated Copper Tube