Circulation Booster Heater Elements 750 W Watts Sheath Material Steel Watt Density 23 sq in Heater Voltage 120V AC 1 Phase Overall Length 18 3/16 in Control Range 150 Degrees to 560 Degrees F 1 1/4 in NPT Enclosure Type NEMA 1 Min Immersion Depth 13 in For Use With Mfr No CHF02306 Includes Thermostat