Made from high-quality magnesium material, this anode rod attracts and absorbs oxidizing substances and contaminants in the water through electrolysis, helping to prevent rust and corrosion in metal water tanks, ensuring long-lasting performance of your RV water heater. These magnesium anode rods are more effective than aluminum alternatives in protecting your water heater tank from corrosion and extending its lifespan. The anode rod helps extend the life of the water heater by attracting corrosive elements in the water. If the anode rod becomes depleted or fully decayed, the water heater tank may begin to rust, crack, fail, and eventually leak. This magnesium anode rod measures 4.5 inches (115mm) in length, has a diameter of 0.5 inch (13mm), and features 1/2-inch threads. Designed for easy installation and compatibility with applicable models. Recommended use: For RV water heaters. To drain the tank, unscrew the anode rod. If the rod is significantly corroded, replace it with a new one. It is advisable to keep a spare anode rod on hand for timely replacement. Color: Silver Material: Magnesium Alloy + Steel Note: Due to different production batches, the appearance and color of the anode rod may vary slightly from the image shown, but this does not affect functionality. Package Contents: 2 x RV Magnesium Anode Rods 1 x Thread Seal Tape (color may vary randomly; specific color requests cannot be accommodated) Please note: Only the items listed above are included. Other products or accessories are not part of this package. Lighting and monitor settings may cause slight variations in the color of the item as seen in photos compared to the actual product. Measurement error allowance is +/- 1-3 cm.