F2WGB22B 4.5 x 20 2-Stage Whole House Water Filter Replacement Pack Set wit

The second and third filter is a duo 5-micron CTO coconut shell carbon block filters. The carbon block filters knock out bad tastes and odors, combine to remove up to 99% of chlorine from the water, and are highly effective on organic chemicals (VOCs) like pesticides, herbicides, and industrial chemicals.