Universal Water Heater Element Adapter Kit, Contains One 2-1/2" 4 Bolt Adapt A Flange, 1 Four Hole Gasket, 1 Screw In Gasket, One 4-5/16" Thermostat Bracket, Eighteen 5/5" Hex Washers & Relok, Converts Screw In Elements To Replace Round Head, Flat, Or Universal Flange Elements.