Hayden Automotive 3651 Adjustable Thermostatic Fan Control Adjustable thermostatic fan control For use with Rapid-Cool and super duty electric fans Contains gaskets, o-rings, or seals to properly replace the product Zinc coated terminal to resist corrosion Screw-In Type/Thread-in probe for installation in water jacket or radiator Adjustable thermostatic fan control For use with Rapid-Cool and super duty electric fans Thread-in probe for installation in water jacket or radiator