Dimensions: Fits most 10 inch x 2.5 inch reverse osmosis systems - 5 pack of 5 micron coiled water filter. Universal water filter replacement fits all standard 10 inch RO systems and whole home. Quality Filtration: Made from 100% pure polypropylene microfibers. The string wound water filter has a deep bed filtration function, which features a honeycomb structure that is dense inside and sparse outside. The string wound sediment filter can reduce sand, scale, rust, sediment, and particles by 99.99%. High Capacity: The filter can filter 20,000 to 30,000 gallons depending on water quality. Suggest replacing it every 3 to 6 months for the average household for optimal performance depending on usage. Multiple Benefits: Offers high filtration precision, large flow rate, small pressure difference, high compressive strength, high pollution tolerance, non-toxic and tasteless materials, and no secondary pollution. Excellent Performance: String wound filter element uses polypropylene microfibers tightly wound on a porous core according to a specific process. The honeycomb structure with a sparse exterior and dense interior provides effective depth filtration and removes suspended solids, rust, particles, and other impurities from water.