The Cigarette Filter Cartridge protects you from harmful substances without altering the taste of your cigarette.There is a filter inside this Cigarette Filter Cartridge that I believe you replace with it becomes discolored. This Cigarette Cartridge Tip can percolate part of harmful substance, and you will not breathe in too much nicotine. Reduces TAR & NICOTINE by double filtering system. One filter cartridge is good for 15 to 20 cigarettes. This Filter Cartridge Tip is used to reduce tar and nicotine by double filtering system. Exquisite and practical. It's able to filter tar, nicotine from your cigarette, great for health.So it is the best choice for the smoker.
Other Thoughts:I use these filters in the basement to remove the mustiness; in the kitchen to remove strong food odors; and in a room with a large parrot to get rid of the odors that come with a large bird. I use a shop-vac to extend the life of these filters.