The Eastman 42 Inch Flexible Magnesium Anode Rod is designed to help extend the life of water heater tanks. Made with four sections of magnesium links connected by a flexible carbon steel cable, the rod is easy to install even in areas with limited clearance. It includes a durable stainless steel 3/4 in x 5 in NPT threaded connection and is compatible with most residential water heaters. This anode rod helps draw harmful elements away from the tank lining, reducing the risk of premature wear. It can also help minimize sulfur odors often associated with hot water systems. The rod requires a minimum of 12 in clearance for installation, and should be inspected every two years and replaced as needed. Finished in chrome for a professional look.