Rheem UV12891 Screw-In Element, 240-volt/1500-watt, Copper Element - 240V/1500W Copper non-resistored mwd - 1 in screw-in Watt density classification: mwd, input Voltage (V): 240, wattage at 240V (w): 1500, watt density at 240V (w/sq. In. ): 127 Element length - flange to tip (in.): 7.63, ACTUAL thread size - outside diameter (in.): 1-9/32, nominal thread size - (in.): 1 Element length - flange to tip (in.): 7.63, ACTUAL thread size - outside diameter (in.): 1-9/32, nominal thread size - (in.): 1