A. Compatibility: It is suitable for all devices with a standard 3/4 inch NPT anode rod interface, including many devices within the state. B. Extending the service life of the water heater: The magnesium anode rod is more prone to corrosion than the water heater tank. Generally, the magnesium anode rod should be checked every two years. Regularly replacing the anode rod can extend the service life of the water heater, save money and time, and avoid the inconvenience of replacing the water heater. C. Advantages of the magnesium anode rod: The magnesium anode rod generates a stronger current than the aluminum anode rod and can prevent tank corrosion more effectively. The anode rod is expected to provide approximately two - year anti - corrosion protection. D. Dimensions: - Length: 44 inches/1100 millimeters - Diameter: 0.8 inches/21 millimeters, 3/4 inch NPT thread E. Color: Silver F. Material: Metal G. Package contents: - 1 magnesium anode rod - 1 1 - 1/16 inch hexagon socket wrench - 1 roll of polytetrafluoroethylene sealing tape Only the above package contents are included, and other items are not included. H. Precautions: Light and different displays may cause the color of the item in the picture to vary slightly from the actual product. The allowable measurement error is ±1 - 3 centimeters.