Camco 4500W 240V Water Heater Fold Back Screw-In Better Element. It features a low watt density of 75+ watts per square inch and a minimum tank diameter of 13", making it suitable for most models of American, A.O. Smith, Bradford White, Craftmaster, General Electric, GS Wood, Kenmore, Lochinvar, Maytag, Mor-Flo, Reliance, Rheem, Richmond, and Ruud. UL/CSA listed for safety, it comes with a gasket and detailed instructions for easy installation. Backed by a 1-year warranty.