12V 3/8" 175~185 Dual Fan Engine Thermostat Temperature Relay Switch Kit This kit includes a dual fan thermostat switch designed to regulate engine cooling by activating fans at a set temperature range of 175°F to 185°F.The switch features a 3/8-inch NPT thread for standard compatibility with various radiator and coolant system setups.It operates on a 12-volt system, commonly used in automotive and light vehicle applications.The relay included in the kit helps manage electrical load, fan.This assembly aids in maintaining engine temperature by automatically engaging the cooling fans when the preset threshold is reached.