B&P Lamp 2 5/8" X 7 1/2" Chimney, Clear 2 5/8 inch fitter by 7 1/2 inch height and 3 1/2 inch bulge Fits Rayo & C.D. burners Slim-Line Chimney Borosilicate Glass All glass chimneys will vary in thickness due to the manufacturing process. They will fit the holder/burner specified in their description.