Tpn01174 Square Flanged Immersion Heater Has A 12.44" Immersion Length. The Incoloy 800 Sheath Is .475" In Diameter With Three Elements, And Makes This Immersion Heater Good For These Typical Applications: Hot Air Dryers, Dehumidifying Dryers, Heat Exchange Systems, Water, Water Solutions, Steam Tables, And Air Heating. This Flanged Heater Is 2500 Watts Made For 480 Volt 3 Phase Power. The Flange Is 3.5" By 3.5" By .25" Thick. Compare This Heater To 011-026 Flanged Immersion Heater