Rheem SP10552KL Water Heater Element, Small Element - 240V/3500W Copper resistored lwd - 1 in screw-in fold back Watt density classification: lwd, input Voltage (V): 208, input Voltage (V): 240, wattage at 208V (w): 2630, watt density at 208V (w/sq. In.): 67 Element diameter (in.): .260, element length - flange to tip (in.): 13.81, mounting Type: threaded, ACTUAL thread size - outside diameter.): 1-9/32 Thread Type series designation: NPSM, configuration: fold back, nominal thread size - (in.): 1, threads per inch: 11-1/2