ABOUT PRODUCT: It is a package of 4 String Wound Sediment water filter cartridges that are compatible with Model HF-150A, HF-160, HF-360A, and HF-365. It has a larger surface area and has a longer filter life. This water filter cartridge removes more pollutants by providing "depth" filtering. REMOVE TASTES SMELLS: To remove tastes, smells, and sediment from cold water, use this compatible filter cartridge. EFFICIENCY: Our water filter cartridge eliminates pollutants and impurities from water. At the same time, it effectively preserves many vital minerals. For optimal performance, water filter cartridges should be replaced every 3 to 6 months based on the quality of your water FEATURES: Our water filter cartridge particularly offers a larger surface area and a longer life. This replacement cartridge will provide you with high filtering performance at a lower cost.