Extends the life of a water heater by attracting corrosive elements in the water. The exclusive anode rod absorbs the corrosive action acused by hot water and prolongs the life of your water heater tank. Made using high-quality -material. Our -rod absorb oxidizing substances and all the contaminants in the water towards itself by electrolys, preventing the water tank from rusting in the metal water tank, ensuring your RV water heater lasting use. These anode rods are 9.15 inch long or 235mm, 0.82 inch diameter or 21mm, 3 or 4inch NPT threads,fits for 232767 and for -Flo 6 Gallon water heater anode rod. Unscerw the anode rod to drain the tank. If the rod is mostly eaten , replace with a new one. Always keep a spare in your RV. Colour:silver and black Material: Alloy and Steel Different batches, the appearance and color of the anode rod may be different from the picture, which does not affect Package Contents: 2 x RV anode rods 1 x PTFE tape (the color of the tape is random, don't accept the specified color) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.