This is a great, economical replacement cartridge for sediment removal with taste and odor reduction. It is 9-3/4 inches long and 2.5 inches across. For use in Ametek, Pentek, American Plumber, Culligan, and other filter housings. 5-micron rating for clear water. Can be used for whole-house or drinking water applications (including reverse osmosis prefilter). Sold as a 4-pack.