ABOUT THIS ITEM 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 of 100% virgin polypropylene microfiber. The bobbin wound water filter has a deep filtration function with dense honeycomb structure inside and sparse outside. The wire-wound sediment filter reduces sand, scale, rust, silt and particulates by 99.99%. High Capacity: Filter can filter 20,000-30,000 gallons depending on water quality. The average household is recommended to replace it every 3-6 months for optimal performance, depending on usage. Multiple advantages: It has the advantages of high filtration precision, large flow rate, small pressure difference, high compressive strength, high pollution resistance, non-toxic and tasteless, and without secondary pollution. Excellent performance: The wound filter element is made of polypropylene microfibers tightly wound on a porous frame through a specific process. The honeycomb structure is dense on the outside and dense on the inside. With good depth filtration effect, it can effectively remove suspended solids, rust, particles and other liquid impurities.