American Volt 160'f Low Temp Dual Electric Radiator Fan 3/8" Inch Ground Thermostat Switch Kit Universal fit for any automotive vehicle and 12V electric fan. Activates up to (2) fans by grounding at pre-set temperature. 160'F turn-on temperature, 145'F turn-off temperature. 3/8" NPT thread-in brass probe. Probe typically threads into radiator, water outlet or manifold.