Rheem SP10869KL Screw-In 240-volt/3500-watt Element, Premium Resistored Stainless Steel Element - 240V/3500W stainless steel resistored lwd - 1 in screw-in Watt density classification: lwd, input Voltage (V): 208, input Voltage (V): 240, wattage at 208V (w): 2630 Watt density at 208V (w/sq. In.): 55, wattage at 240V (w): 3500, watt density at 240V (w/sq. In. ): 73, cold resistance (ohms): 16.50