Description Boss 110-135 Pressure Switch for Airtanks and on-board air systems Our pressure switches are used to automatically turn off the compressor when it reaches the appropriate max pressure (135psi). And when air has depleted it will automatically turn the compressor back on when the pressure drops to the minimum pressure (110psi). Ideal for all 12volt onboard air systems 1/4″ NPT male thread (most common air tanks) 12volt DC On at 110psi Off at 135psi Japanese Made Quality