Chromalox CIR Electric Cartridge heaters are used for heat transfer by conduction or convection to heat liquids, air, gases and platens. The Chromalox 275389 is a 2.375 inch overall length Electric Cartridge Heater, 1/2 inch diameter, 120 Watts and 240 volts. The CIR series of cartridge heater has standard 12 inch swaged leads at one end and an incoloy sheath. Heaters are UL/UR and CSA listed. The Chromalox part number for this Chromalox Electric Cartridge heater is CIR-3027.