The Rheem Magnesium Anode Rod measures 0.750 inches in diameter and 13-3/8 inches long, designed to protect your water heater from corrosion. This essential component helps extend the lifespan of your water heating system by attracting corrosive elements in the water. Made from high-quality magnesium, it offers superior protection compared to aluminum or zinc alternatives. The anode rod is easy to install and compatible with various Rheem models, making it a vital addition for both residential and commercial applications. Ensure the longevity of your water heater with this reliable anode rod.