3500W, 240V, 13.25"H, Universal Flange Element, High Watt Density, 150+ Watts Per SQIN, Fits Most Models Of American, A.O. Smith, Bradford White, Craft Master, General Electric, Gs Wood, Kenmore, Lochinvar, Maytag, Mor-Flo, Reliance, Rheem, Richmond, Ruud, Sears, State, & Whirlpool Heaters, Gasket & Detailed Instructions Included, Minimum Tank Diameter 14", UL Listed, 1 Year Warranty.