2 x 1st Stage: 5 micron 10-inch high-capacity polypropylene filter blocks sediment, sand, dust, particles, and rust. Lasts 6 – 12 months dependsing on water quality. 2 x 2nd Stage: 5 micron 10-inch Granular Activated Carbon absorbs gets rid of unpleasant chlorine, tastes and odors, cloudiness and colors. Lasts 6 – 12 months dependsing on water quality. 2 …