High Quality Magnesium Protects better and lasts longer than Aluminum Anodes Measures 9 ¼ Long and has ¾ NPT Thread, Uses a 1 1/16’’ socket Prolongs & Saves Water Heater Tank Life & Helps Eliminate Harmful Contaminants. Replacement for Suburban & Mor-flo 6 Gallon Water Heaters. Value Pack of 2 so you always have a spare on hand. ARL Outdoors Anode Rods have become the leader in water heater protection technology across the RV & Camper market for good reason and you can get yours today! Our anode rods are manufactured to the highest of quality and standards on the market today and out perform over the competition time and time again.