Wolo (PS-2 Pressure Switch Specifically designed for Wolo's high-pressure on-board air systems, Models 858 and 860 and is compatible for a wide variety of other manufactures on-board air systems The switch is factory preset to turn on the compressor when tank pressure is below 100 PSI and turn off the compressor when the tank pressure reaches 130 PSI, with a tolerance of 10 percent (pressure turn on/off pressure range is not adjustable) Rated to operate reliably up to 25 amps Built to be compact in size Connects with standard 1/4 inch push-on terminals