Rheem SP10552PH Resistored MWD with Screw-In 240-volt/5500-watt Element Element - 240V/5500W Copper resistored mwd - 1 in screw-in Watt density classification: mwd, input Voltage (V): 208, input Voltage (V): 240, wattage at 208V (w): 4130, watt density at 208V (w/sq. In.): 103 Replacement part