KOREA Pneumatic Polyurethane Tube PU Tube PU Air Hose Clear The polyurethane tube is water resistant, flexible, chemical & abrasion resistant and can be used in any weather, even low temperature. It is flexible, reasonable & can used for a variety of application. The tubing is tough, strong, kink resistant and abrasion resistant, yet it’s flexible and it’s easy to assemble onto designated fittings. Working temperature range -20°C~80°C