Regularly replace your filter to keep your Brita? Faucet Mount System in top performance for healthier* great tasting filtered water on tap. From the world?s #1 brand in water filtration** this replacement water filter uses Advanced Brita? Carbon-block technology is certified to reduce chlorine (taste and odor) and reduces 60+ contaminants including 99% of lead and even microplastics***. This Brita? filter system replaces 1 800 bottles**** per year. Lasts approximately 4 months so you only have to change it 3 times per year*****. Does not fit pull-out or spray style faucets. *Based on health contaminant reduction per WQA certifications. **Based on latest 52wk IRI unit sales data as of [enter most recent date]. ***See certifications. Substances reduced may not be in all users? water. ****Standard 16.9 oz single use bottles. *****Approx. timing based on average family usage and 100 gallon filter life. Refer to system?s indicator for actual time to change.