Screw Plug Immersion Heater 1 500 W Watts Sheath Material Steel Screw Plug Material Steel Watt Density 23 sq in Heater Voltage 120V AC 1 Phase Overall Length 23 9/16 in Control Range 60 Degrees to 250 Degrees F 1 1/4 in NPT Enclosure Type NEMA 1 Min Immersion Depth 18 1/2 in Includes Thermostat