Designed for today's high pressure refrigerants. R-410A pressure temperature scale on gauge face. Vibration free Gauges 800 PSI high side, 250 PSI low side. Includes pressure / temperature chart for a wide range of other refrigerants. Three 60 color coded (1/4 FFL) Enviro-Guard Hoses with in-line ball valves Designed for today's High Pressure Refrigerants with vibration free Gauges scaled to 800 PSI High Side, 250 PSI Low Side. They feature a R-410A Pressure Temperature Scale on the gauge face and also include a pressure / temperature chart for a wide range of other refrigerants. Three 60 color coded (1/4 FFL) Enviro-Guard Hoses make the set complete and even have in-line ball valves for positive shut off preventing blow back when removing or installing them. The hoses rated at 740 psi working pressure, 3700 psi burst pressure. Enviro-Guard Hoses are constructed of special barrier material which prevent virtually any permeation of refrigerant, yet remains flexible.