Industry leading 3-Year Warranty. The OilShield air hose is the best SHOP hose on the market today, it is RMA Class A oil resistant rated rubber hose with a Nitrile core and Nitrile cover, the best oil resistance rating possible. Oil-Shield unlike other heavy and stiff rubber air hoses is 30% lighter than traditionally made rubber hoses, more flexible & stronger. It is the perfect shop hose where hoses come in contact with oil, diesel fuel, gas, cleaning agents and anything else found in shops including welding spatter and grinding sparks.