4 pcs 15 - Stage Replacement Cartridge Universal High Output Shower Filter with VC, Reduce Hard Wate HEALTH CARE SHOWER SYSTEM: Our cartridge has 15 stages of filtration for effectively reduces chlorine, heavy metals, fluoride, lime and scale in water. WATER PURIFIER: Requires replacement once in 4-6 months (~ 10 000 gallons) depending on water quality and frequency of use. Use the whole family and dont worry about the soon shower cartridge replacement. REVITALIZING BODY: Reduces dry skin, dandruff, cares about the skin, hair, and nails. UNIQUE, SCIENTIFICALLY FORMULATED: Bath filter without cheap carbon and calcium sulfate that clogs your flow and stops working fast UNIQUE, SCIENTIFICALLY FORMULATED blend for longer lasting, maximum filtration in hot and cold water. EASY REPLACEMENT: No tools required for replacing. Just open the housing of the shower cartridge filter, take out old and replace with new one