Rheem SP10869PH Screw-In 240-volt by 5500-watt Element， Premium Resistored Stainless Steel<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Element - 240V/5500W stainless steel resistored mwd - 1 in screw-in</li><li>Watt density classification: mwd， input Voltage (V): 208， input Voltage (V): 240， wattage at 208V (w): 4130</li><li>Element diameter (in.): .316， element length - flange to tip (in.): 13.47， mounting Type: threaded， ACTUAL thread size - outside diameter.): 1-9/32</li><li>Thread Type series designation: NPSM， configuration: fold back， nominal thread size - (in.): 1， threads per inch: 11-1/2</li></ul></div><img src="http://ecx.images-amazon.com/images/I/418GMl9lQ1L.jpg" noproxy>