New in box AQ-4125 Shower Filter Replacement Cartridge for the Aquasana shower system Made in USA The Shower Filter Replacement Cartridge fits in all Aquasana Shower Filters (AQ-4100) and lasts for 10,000 gallons or up to 6 months. Aquasana's Shower Filter is independently tested to NSF/ANSI Standard 177 to reduce over 90% of chlorine in shower water. The essential health and beauty product, the Shower Filter reduces your skin's exposure to harsh chlorine that can cause skin damage and excessive drying. Shower in Aquasana filtered water for noticeably softer, more moisturized skin and shinier, healthier hair. Natural coconut shell carbon filters out chlorine, while patented Copper-Zinc (KDF) media further reduces chlorine and prohibits bacteria and algae growth. Chlorine can evaporate in steam, contaminating the air you breathe. Our Shower Filter is independently tested and proven to reduce over 90% of chlorine, instantly improving your air quality for a cleaner, healthier shower experience. Naturally enhance your bath products and hair treatments with filtered water. Aquasana's Shower Filter helps you to use less shampoo, conditioner, soap, and body lotions. Aquasana's unique upflow design prevents media channeling and clogging, retains shower head height and water pressure, and increases water contact time with media for superior filtration. This BPA-free shower filtration system is an easy DIY install, filters can be replaced within minutes – no tools or plumber required