About This 20-Stage Filtration:Ceramic Balls, Activated carbon, Calcium Sulfite and other filtering materials ensures best effect of water quality purification; 20 stages shower filter can effectively reduce chlorine, fluoride, heavy metals, rust, sand and other sediment Replaceable Cartridge: Contains a total of 2 filter cartridge（One has been installed）; A filter cartridge can be used by a family of four for about 6-8 months Essentials For Body Care: Shower head filter removes unpleasant odors & impurities, reduce dry and itchy skin; Especially suitable for people with sensitive skin, children and pets 1/2" Thread Type, Widely Compatibility : Our shower filter uses standard 1/2" thread type for most homes and can be placed on rain shower heads, fix shower heads and hand showers; (But still please confirm the size for installation before purchase) Consistent Water Pressure and Easy Installation : High output shower filter won’t reduce existing water pressure for an improved rinse; Installation takes only a few minutes and no tools required; We also supply free teflon tape and 2 rubber washers to avoid leakage; Installation is simple and only takes a few minutes