The flusher can lift the sentiment at the bottom of the water heater and the anode rod absorbs the action caused by hot water. Perfect RV solution for prolong water heater tank life and save your money and time ! Extends the life of a water heater by attracting in the water. The anode rod absorbs the action acused by hot water and prolongs the life of your water heater tank. Made using high-quality magnesium-material. magnesium-rod 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. Rv water heater anode rod are 9-1/4 inch long with 3/4 inch NPT connections and fit most RV . The anode rod uses electrolysis to attract all contaminants in the water to itself, which prevents rv tank corrosion and mineral buildup, eliminates your travel water heater odor problems, and extends the life of your RV, , mobile home, and car water heater. Material: Metal+plastic colour: Black+silver Package Contents: 1 x RV Water Heater Tank Flusher 2 x Anode Rod 1 x Tape(Note: Random color, 't accept the specified color.) Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.