2 Pack 1/2 inch NPT RV Water Heater Anode Rod with Tape Magnesium Anode Rod for Heaters 11553 Made from high-quality magnesium material, this anode rod helps protect your RV water heater by attracting corrosive elements in the water through electrolysis, reducing tank corrosion and extending the life of your water heater. Magnesium anode rods are effective in preventing rust and corrosion in metal water tanks, offering better protection compared to aluminum rods in many water conditions. Extends the lifespan of your water heater by sacrificing itself over time. If the anode rod becomes significantly depleted or fully corroded, the tank may begin to rust, leading to cracks, leaks, and eventual failure. These magnesium anode rods measure 4.5 inches long (115mm) with a 0.5 inch (13mm) diameter and 1/2 inch NPT threads. Designed to fit compatible RV water heaters. To drain the tank, unscrew the anode rod. Inspect the rod regularly and replace it if heavily corroded. It is recommended to keep a spare on hand. 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, but this does not affect performance. Package Contents: 2 x RV Magnesium Anode Rods 1 x Thread Seal Tape (color may vary randomly; specific color requests cannot be accommodated) Note: Light reflection and differences in display screens may cause slight color variations between the product image and the actual item. Measurement error allowance: +/- 1-3 cm. Only the items listed above are included; other accessories are not included.