The Rheem AP11524C magnesium anode rod measures 0.840 inches in diameter and 44-3/16 inches in length, designed to protect your water heater from corrosion. This essential component extends the lifespan of your water heater by attracting corrosive elements in the water, thereby preventing damage to the tank. Made from high-quality magnesium, it meets industry standards for safety and performance. The anode rod is compatible with various Rheem models, making it an ideal replacement part. Regular replacement of the anode rod is crucial for maintaining the efficiency and longevity of your water heater.