Auto shut-off valves automatically retain refrigerant in the service hose. Meet EPA, SAE, and UL standards for containment of refrigerant. 96" Set includes one blue, one red, one yellow hose. 750 PSI working pressure . Burst Pressure 3,000 PSI Auto shut-off valves automatically retain refrigerant in the service hose when they are removed from the system. Replace your old shorter hoses with this more professional, safe and convenient set.