Aluminum Zinc Anode Rod (.800 x 3/4 x 44″ Hex Head Flexible Anode) - Stops Rotten Egg Smelly Water!<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>The Cure for Rotten Egg Smell in Hot Water (caused by hydrogen sulfide)</li><li>Replaces Water Heater Tank’s Existing Magnesium Anode Rod (Hex Head Only)</li><li>Extends life of water heater tank</li><li>Passive (not powered) anode rod</li><li>Not recommended when water softeners are in use (see note in description)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41JbDk-hvPL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/21kB3kuCadL.jpg" noproxy>