General description The 10-inch replacement water filter cartridge pack includes 4 polypropylene wrapped sediment filters designed for use in reverse osmosis systems. These cartridges provide a greater filtering surface area, ensuring longer life and deeper filtration to effectively remove contaminants from your water supply. Technical specifications Dimensions: 2.5 x 10 inches Material: 100% virgin, multi-layered, meltblown polypropylene microfibers Usage Change every 4 to 6 months or every 50,000 to 70,000 gallons of water, depending on water quality. Regular replacement is necessary to maintain great tasting water.