Robinair Enviro-Guard 7 2 inch Hose with 45 Degree Quick Seal Fittings, (Set of 3) Special barrier material prevents virtually any permeation of refrigerant yet remains flexible. It comes with a 45 degree Quick Seal fittings and 740 psi working pressure and 3700 psi burst pressure. It comes with a 60 inch Yellow Enviro-Guard Hose with 45 degree Quick Seal Fitting.