60" Red Standard Fitting (1/4" FFL) Enviro-Guard Hose is rated at 740 psi working pressure, 3700 psi burst pressure. Designed for today's High Pressure Refrigerants. Features an In-line ball valve for positive shut off preventing blow back when removing or installing them. 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.