Industry leading 10-Year Warranty. The 3/8" BluBird Air Hose beats the competition with superior quality and features. It is made of 100% rubber with a 40% weight reduction compared to standard rubber air hoses. The solid brass fittings are stronger than aircraft aluminium, and the high-strength polyester woven reinforcement can withstand 300 PSI working pressure. The hose is flexible from -50°F to +190°F, ozone resistant, and abrasion resistant.