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, ... JISH-3300, GB/T-17791(copper tube) Insulated Material: PE Character: Anti-UV, good heat resistance, low water absorption ... seaworthy strong carton box insulation copper tubes for air conditioner