2 Pack, Spun Polypropylene Cartridge, 1 Micron, Includes Filter Change Reminder Stickers, Cartridge Life 2 Months/8,000 Gallons, Reduces Sediment, Rust, Scale, Dirt, Coarse Sand, Fine Sand, Extra Fine Sand & Silt, For Use With TV #s: 216-912, 529-096 & 583-328, Level 4 Advanced Filtration.