Lamplight Farms 31507 Large Standard Burner Turning knob allows you to adjust the size of the wick 1.75 inches For best results, use with Lamplight&reg; Classic and Ellipse lamps, Lamplight&reg; 3/4" flat wick (all sold separately) Replacement component for Lamplight&reg; Classic and Ellipse lamps (sold separately) For use with Lamplight&reg; 3/4" flat wick (sold separately)