B&P Lamp 2 5/8" x 10" Clear Chimney for Rayo & Central Draft Burners 2 5/8 inch fitter by 10 inch height and 3 5/8 inch bulge Fits Rayo and Central Draft Lamps Borosilicate Glass Heat Resistant All glass chimneys will vary in thickness due to the manufacturing process. They will fit the holder/burner specified in their description.