American Volt Dual Performance 12" Inch Electric Cooling Fans & 3/8" Thread-in Thermostat Kit (180'F Turn On/165'F Turn Off) 12 inch curved blade 12 volt electric radiator cooling fans. High Performance 80 watt motors will keep your engine cool. Kit includes thermostat switch and fan mounting kit. Thermostat has preset turn-on and turn-off temperatures. 3/8" NPT thread-in brass temperature probe.