Fangrui Product Details Powerful Filtration Capacity - 20-stage Hard Water Softener Shower Head Adopts Multiple Filtering Materials Such As Kdf 55, Alkaline Ceramic Balls, Activated Carbon, Calcium Sulfite And Other Filter Balls, Which Can Purify Water Without Reducing Your Water Pressure. Capacity Of Each Is 12,000 Gallons Of Water, Which Means It Can Provide Clean And Odorless Water And Can Be Used By A Family For 1-2 Years. (depends On Your Local Water Quality And Use Frequency!) Complete Compatibility - 20 Stage Shower Filter Cartridges Uses A Standard 1/2inch Thread Type. It Fits Most Similar Design Shower Filter Shell (e.g.: Fit For 10, 12, 15, 17, 18, Multi-stage Or 20 Stage Filter Shell. Essentials For Body Care - 20-stage Filter Can Effectively Remove Chlorine, Heavy Metals, Fluoride, And Scale In Water, Soften Water Consistently And Make Your Skin And Hair Healthier. Order And New Shower Filter Universal From, Help You To Unpleasant Odors Impurities And Achieve More Pleasant Showering