[Superb Filtration Performance] FG15B-KS 10” x 4.5” compound filter is designed to effectively remove chlorine, lead, mercury, hydrogen sulfide, iron, chloride, chloramines, herbicides, odors, and other contaminants or impurities. [Water Health Warrior] Teaming up with carbon filters like iSpring FC15B, this filter is super powerful to remove the unpleasant taste or odor left in chlorinated water while maintaining the protection benefits of chlorine in water disinfection. They also tackle problems like turbidity, cloudiness, colors, bad taste, and odors like hydrogen sulfide that smells like rotten eggs. A reliable shield that protects you and your family from ingesting harmful chemicals or contaminants in your tap water. [Great Compatibility] Official 1st stage replacement filter cartridge for iSpring direct connect Point-of-Use(POU) undersink water filtration system US21B. Fits standard 10" undercounter or whole house water filtration systems. Individually sealed for freshness. [Exceptional Filter Life] Based on the contaminant levels in source water and your water use, we suggest that you change your filters every 8-12 months for best filtration performance. Hassle-free filter cartridge replacement is a breeze! [TDS Note] Please be noted that the system for which this filter works is NOT designed to reduce Total Dissolved Solids(TDS) removal and instead keeps essential minerals in your water. If you are interested in a filter that significantly reduces TDS, please consider our iSpring Reverse Osmosis (RO) systems RCC7 series or tankless RO500. [Peace-of-Mind Support] We offer tech and CS support via phone and email from Atlanta, GA. Contact our responsive and professional team for product selection to suit your water filtration needs and after-sale support to maximize your user experience. Now, and years to come, we will be right here and ready to help. Capacity: 80000 gallons