The Robinair 19300 is a 96" Red Ball Valve End Hose for High Pressure gases. Ball Valve end prevents gas leakage or loss when removing hoses from their fittings. Safe for use on all refrigerants. Enviro-Guard Hoses are constructed of special barrier material which prevent virtually any permeation of refrigerant, yet remains flexible. Meet all specifications for low permeation construction. 740 psi working pressure, 3700 psi burst pressure.