To be used on ALADDIN MANTLE LAMPS New and improved genuine Aladdin mantle Fits models 12, A, B, C, 21, 21C, 23 and MaxBrite 500 with no adaptor needed *Note: For lamps made prior to 1928 (Models 3-11), a Kone Kap Mantle Adaptor #N146A is required because Kone Kap mantles are no longer being produced. The adapter allows you to continue to use your lamp. Note: The model number for all Aladdin lamps is on the end of the wick adjustment knob. The blue on the mantle is a protective coating used in shipping. You must burn the blue coating off prior to use. (The mantle is white.)