This 2.5″ x 10″ premium bone char + activated alumina refillable inline filter uses high grade filtration media for chlorine, taste, and odor treatment. This bone char and activated alumina filter is most often used for fluoride removal, as well as filtering a range of toxic heavy metals including lead, aluminum, manganese, and silver. This filter fits any standard housing made for 2.5″ x 10″ cartridges. Save money with this refillable inline filter.