insulation copper tubes for air conditioner Size: 1/4", 3/8", 1/2", 5/ ... widely applied in the vehicle, ships, buildings, chemical engineering, air condition, refrigerator, etc.Standard Complied: ASTM B-280, ... .length=50m) Insulated tube can be made with black rubber material. Insulated tube can be printed with black letter. ... : seaworthy strong carton box insulation copper tubes for air conditioner