Universal Cartridge: Compatible with most shower filters,including 10,12,15,20,25,and 30 stage models. It perfectly replaces your existing filter cartridge while delivering superior filtration performance Efficient Chlorine Removal: 100% dedicated to water filtration,the R7 Shower Filter Cartridge can eliminate 99.99% of chlorine and 98% of harmful substances from water within 0.2s Unique Design: Our filter cartridge features a high-speed rotating impeller,which makes water fully penetrates the filter material,achieving a 100% water usage rate Why It's Needed: In some areas,hard water quality causes issues such as hair loss and dry skin. The R7 Shower Filter Cartridge was developed specifically to address these concerns Customer Favorite: Within just four weeks,over 90% of users report reduced hair loss,and 97% notice their hair becoming softer and shinier. All this for just $0.12 per day (the R7 Shower Filter Cartridge lasts up to 6 months) No Worries About Water Pressure: We have conducted hundreds of water pressure tests,and installing the R7 Shower Filter Cartridge has no effect on water pressure whatsoever. You can use it with confidence Easy Installation: Even those with no installation experience can set it up in less than 2 minutes Customer Service: We welcome your feedback and offer 24/7 online customer service to address any issues. We hope you find exactly what you're looking for with the R7 Shower Filter Cartridge.