About this product Size: Fits most 10" x 2.5" reverse osmosis systems - 3-pack micron water filters. Universal water filter replacement works with all standard 10-inch and whole-house RO systems. Premium Filtration: Made from 100% virgin polypropylene microfiber. The wound water filter features deep filtration with a honeycomb structure that is dense inside and sparse outside. The wound sediment filter reduces sand, scale, rust, silt, and particles by 99.99%. High Capacity: The filter can filter 20,000 to 30,000 gallons depending on water quality. It is recommended that an average household replace it every 3-6 months for optimal performance, depending on usage. Multiple Benefits: It has the advantages of high filtration precision, large flow, small pressure difference, high pressure resistance, high contaminant resistance, non-toxic and tasteless, and no secondary pollution. Excellent Performance: The wound filter element is composed of polypropylene microfiber tightly wound on a porous frame through a specific process. The honeycomb structure is dense on the outside and dense on the inside. With a good deep filtration effect, it can effectively remove suspended solids, rust, particles, and other contaminant liquids.