The Aladdin High Altitude chimney is designed for use in applications over 4,000 feet in elevation. The chimney has been engineered to be installed on Aladdin Kerosene Mantle Lamp burners 1 through 11 and 23A. Installing a High Altitude Chimney at sea level can increase light output by 20%. Instructions: Slip bottom of chimney into top of burner gallery and seat to bottom. Adjust gallery prongs, if necessary, for snug fit. Made of borosilicate glass. Made in China. Overall height 15". Chimney features black stylized Aladdin lamp logo that cannot be removed.