P1 Culligan Whole House Water Filter Cartridge - Level 4 replacement water filter cartridge reduces: Sediment, rust, scale, dirt, coarse sand, sand, fine sand, extra fine sand, silt. Filter is made of spun polypropylene cartridge. 1 micron. Premium filtration of very fine sediment particles. Filter life; 2 months or 8000 gallon. 1 per package. - Size: 9.75" H x 2.5" W x 2.5" D, Life of Product: 2 mo or 8000 gal, Rating: 1 Microns, Pkg Qty: 1, Package Type: Box