Made from high-quality magnesium material, this anode rod attracts and oxidizes impurities and contaminants in the water through electrolysis, helping to prevent rust and corrosion in metal water tanks and ensuring prolonged use of your RV water heater. These magnesium anode rods are more effective than aluminum alternatives in protecting your water heater tank from corrosion, thereby extending its lifespan. By attracting corrosive elements in the water, the anode rod sacrifices itself to protect the tank. If the rod becomes depleted or fully decayed, the water heater tank may begin to rust, crack, fail, and leak. This magnesium anode rod measures 4.5 inches (115mm) in length, has a 0.5 inch (13mm) diameter, and features a 1/2 inch threaded connection. Designed to fit compatible water heaters. For use with appropriate water heater models. To drain the tank, unscrew the anode rod. If the rod is significantly corroded, replace it with a new one. It is recommended to keep a spare on hand for your RV. Color: Silver Material: Magnesium Alloy + Steel Note: Appearance and color may vary slightly between production batches, which does not affect performance. Package Contents: 2 x RV Magnesium Anode Rods 1 x Thread Seal Tape (color may vary) Only the items listed are included; other products are not part of this package. Note: Lighting and display differences may cause slight variations in color between the product image and the actual item. Measurement error allowed is +/- 1-3 cm.