Level 4, Heavy Duty Whole House Cord Wound Polypropylene Sediment Filter Cartridge, Reduces Sediment, Rust, Scale, Dirt, Coarse Sand, Sand, Fine Sand, Extra Fine Sand & Silt, 16,000 Gallon Capacity, 4 Month Average Usage, 5 Micron Rating, For Use With TV #852-574 & TV #216-911.