Aquasana Shower Water Filter System Replacement Cartridge - Filters Over 90% of Chlorine - Carbon & KDF Filtration Media - Soften Skin and Hair from Hard Water - AQ-4125Trusted Replacement For Aquasana Shower Filters Replacement cartridge for the AQ 4100, AQ 4125, AQ 4105 Ensure Water Quality w Genuine Replacements Untested replacements are not certified for performance capacity or contaminant removal Premium Carbon Filtration Filter your shower water with coconut shell carbon and copper zinc media that is independently tested to NSF ANSI Standard 177 to reduce more than 90% of chlorine. Replacements Made Easy No