4500W, 240V, Water Heater Screw-In Ripple Fold Back Element, Premium Long Life, Ultra Low Watt Density, Minimum Tank Diameter 15”, Gasket Included, Fits Most Models of American, A.O. Smith, Bradford White, Craftmaster, General Electric, GS Wood, Kenmore, Lochinvar, Maytag, Mor-Flo, Reliance, Rheem, Richmond, Ruud, Sears, State, & Whirlpool Heaters, UL Listed, Best When Water Has High Mineral Content, Withstands Dry Firing, Heats In Lime & Sand Build Up That Would Burn Out Ordinary Elements, Highest Grade Nickel & Chromium Incoloy, Limited Lifetime Warranty.