Light of Mine "Let it Shine" Replacement Chimney's are a high quality replacement chimney for your broken lamps in need of refurbishment. They are made with a Borosilicate Glass to withstand the high temperatures let off from your oil lamp. 3" size refers to the base diameter of the chimney. 7" size refers to the height of the chimney. We are a small American based business dedicated to helping you find exactly what you're looking for when fixing your new and antique oil lamps., Weight: 0.7495716908 Pounds, Manufacturer: China