Reach the Valhalla with this 120/150 PSI pressure switch designed for high-pressure onboard air systems. Ideal for air horns that require high air pressure. Preset to turn on the compressor when tank pressure is below 120 psi, and turn off the compressor when the air tank pressure reached 150 psi, with a tolerance of 10%. Can operate reliably up to 3.5 amps. For 12-volt power source. With 1/8" male pipe thread, and 1/4" push-on electric terminals.