Hayden Thermostatic Electric Radiator Fan Control, Thread-in Kit has adjustable temperature ranges. Compatible with Hayden electric fans and original equipment fans. Thread-in kit features: - Temperature and AC activation - Operation of up to two fans - AC or manual override - Complete instructions and hardware included Adjustable from 160F - 230F. 1/8"MPT thread-in probe for temperature sensing. Installs in water jacket or radiator.