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 and corrosion in metal water tanks, ensuring long-term performance of your RV water heater. These magnesium anode rods function by attracting corrosive elements in the water, protecting the water heater tank from deterioration and extending its lifespan. If the anode rod becomes depleted or fully corroded, the tank may begin to rust, crack, fail, and eventually 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. Compatible with: Atwood. To drain the tank, unscrew the anode rod. If the rod is significantly corroded, replace it promptly. It is recommended to keep a spare anode rod on hand in your RV. Color: Silver Material: Magnesium Alloy + Steel Note: Appearance and color may vary slightly between production batches, but this does not affect functionality. Package Contents: 2 x RV Magnesium Anode Rods 1 x PTFE Tape (color may vary; specific color requests cannot be accommodated) Please note: Only the items listed above are included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error is +/- 1-3 cm.