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, EN- ... -R404A - R507C etc we accept making of customized tube( Max.length=50m) Insulated tube can be made with black rubber ... : seaworthy strong carton box insulation copper tubes for air conditioner