Duo-Therm 5.7KW electric heat element. Can be used in 5KW furnaces. New but not original. Manufactured to Duo-Therm specs. Includes a thermal cut-off switch (part # HPS-L39-136). Round opening shown is not used. Front plate measures 9" x 2-5/8". Unit is 12.25" deep. SORRY, NO LONGER AVAILABLE.