[Maximum 15-Stage Filtration Capacity] Featuring a scientifically formulated process of 12 different premium quality filtration media in 15 stages, iSpring SF series high output shower filters quickly remove up to 99% of chlorine, sediment, hydrogen sulfide, and water-soluble heavy metals. Water quality is further improved by nurturing elements such as Vitamin C being released and added back to your shower water. [Less Cost Longer Life Better Results] Less than a dime a day, iSpring shower filters last longer(6-9 months) than most shower filters on the market FSF1 fights eczema irritation itchiness or dryness, leaving you noticeably smoother skin, softer hair, and stronger nails. A must-have to protect yourself and your family from inhaling absorbing or consuming dangerous chemicals and pathogens during each shower A simple and inexpensive step towards a healthy life. [Never Clog and Easy Replacement] Its unique Never Clog design copes with hard water and prohibits limescale buildup. Tool free design makes cartridge replacement a breeze. Perfect for iSpring SF1S shower filter. Compatible with other on-the-market shower filters that use replacement cartridges of a similar size( Dimensions 2 ⅝ x 2 ⅝ x 3 ½ in ). Note: This filter replacement is intended solely for the SF1S shower filter and should not be used with any other shower filter models. [Consistent Water Pressure] Little impact on water pressure. In case source water has high levels of sediment (common with well water), once a while simply flip the filter cartridge over and flush it with hot water to remove sediment built-up, then set it back in its original position.