Heavy Duty Filter Cartridge, Radial Flow Carbon Design, Reduces, Sand, Dirt, Silt, Coarse Sand, Rust & Scale Particles, Chlorine: Taste & Odor, Bad Taste & Odor, Filter Life Approximately 3 Months/5,000 Gallons, 25 Micron Rating, Use With TV #'s: 216-911 & 852-574.