2pk filter cartridge. CWFD replacement sediment filter cartridge removes fine dirt, sand, silt, rust, and scale particles. 10 microns (nominal) filtration. Durable polypropylene fiber cord wound construction. Filter life up to 3 months or 12,000 gallon. Use with filter model No. HF-150, HF-160, or HF-360. 2 per pack. Filter Life: 3 mo or 12,000 gal, Microns: 10 Microns, Pkg Qty: 2, Package Type: Box