Usage Tips: Made from high-quality magnesium material, this magnesium anode rod attracts and absorbs oxidizing substances and contaminants in water through electrolysis, helping to prevent rust in metal water tanks and extending the life of your RV water heater. These magnesium anode rods function by attracting corrosive elements in the water, protecting the water heater tank from corrosion and prolonging its lifespan. Over time, if the anode rod becomes depleted or fully corroded, the tank may begin to rust, crack, fail, or leak. This magnesium anode rod measures 4.5 inches (115mm) in length, 0.5 inch (13mm) in diameter, with 1/2 inch threads, and is designed to fit Atwood water heaters. To use: For Atwood models. Unscrew the anode rod when draining the tank. If the rod is significantly corroded, replace it. It is recommended to keep a spare on hand in 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 PTFE Tape (color may vary randomly; specific color requests cannot be accommodated) The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight variations in the color of the item as shown in photos. Measurement tolerance is +/- 1-3 cm.