Cartridge Immersion Heater 1 250 W Watts Sheath Material Incoloy(R) Screw Plug Material Brass Watt Density 51 sq in Heater Voltage 240V AC 1 Phase Overall Length 11 1/2 in Control Range 266 Degrees F 3/4 in NPT Min Immersion Depth 10 1/2 in Flange Material PTFE Includes Brass Screw Plugs