Superheated Burner The inverted gas Mantles are suspended from a variety of cast superheaters offering different options depending upon the number of mantles selected. Fishtail Burners The fishtail burner is a flat flame that is produced from a ceramic jet that ensures the flame is stable and provides the visual fishtail shape.This is sometimes referred to as a batswing burner and is preferred when the flame shape and appearance is of more importance than the light output.