Preserves the life of a water heater by corroding themselves so the water heater doesn't.
Minerals in well water are attracted to the rod's magnesium. Without an anode rod, your steel lined water tank could be damaged. Consider a tank flush tool when servicing the anode rod. Flushing the tank yearly will extend the service intervals of this product.
The tank flush wand can be found here
This 9-1/2 inch anode rod fits most Coleman and Fleetwood pop up water heaters. Sometimes refereed to as a hot water element, or sacrificial rod.
Part number 4611563