Yellow Jacket 19020 Replacement gasket (10 pak). Specially formulated rubber tube resists most refrigerants and assures long work life. Blow-off groove channels refrigerant out of the front of the nut to help prevent spray back. Hose cover pin-pricked to resist bubbling and bursting. Individual hose inspection. 2500 psi (172 bar) minimum burst, 500 psi (34 bar) maximum working pressure. Operating temperature -20 ° to 180 °F (-28.8 ° to 82.2 °C). 6" to 100' lengths in yellow, red and blue.