Features and Benefits: Large, easy to read 0-100 psi scale, 0-700 kPa; Solid brass fittings; Pressure relief valve for safe, clean testing; Quickly and easily locate any malfunctioning fuel system component, including fuel filters, pressure regulators, fuel lines, and fuel pumps without removing it from the vehicle.Large, easy-to-read 0100 psi scale, 0700 kPa. Solid brass fittings. Pressure relief valve for safe, clean testing.