American Volt 190'f Electric Fan Radiator Fin Blade 3" Probe Thermostat Sensor Thermo Switch Sensor: 3" Brass Push-in Probe Temperature Sensor. Range: 190'F Turn-on/175'F Turn-off. Terminal: Dual 1/4" Blade Terminals. Mounting: Radiator Fins, Oil Cooler Fins, Condenser Fins.