Rheem SP10552FL Resistored LWD with Screw-In 240-volt/1500-watt Element Element - 240V/1500W Copper resistored lwd - 1 in screw-in Watt density classification: lwd, input Voltage (V): 208, input Voltage (V): 240, wattage at 208V (w): 1130, watt density at 208V (w/sq. In.): 67 240V/1500W Copper resistored leds Element diameter (in.): .260, element length - flange to tip (in.): 10.58, mounting Type: threaded