EASY TWIST CENTRAL REPLACE: The water filter cartridge within its center. No extra filter purchases or installations required, saving your bathroom space. Easily twist the central handle for rapid filter cartridge replacement without disassembling the showerhead, saving you time! 20 STAGE SHOWER FILTER: Our water softener shower head has a built-in 20 Stage shower filter (included KDF 55, alkaline ceramic balls, activated carbon, and calcium sulfite) that effectively removes chlorine, fluoride, heavy metals, and impurities, softening your shower water, to promote healthier skin and reduces hair damage. PERFECT ORIGINAL REPLACEMENT: This filter cartridge specially designed for SR SUN RISE is ideal for original replacement. Each cartridge lasts 2-3 months, is durable and easy to replace, so you can avoid the hassle of sourcing a replacement after use. ONCE CHANGE LASTING 3 MONTH: The filter cartridge lasts for three months per replacement, offering an economical and convenient solution. After use, your hair will gain a lustrous shine, and skin itchiness will be significantly alleviated. SR SUN RISE is dedicated to providing comprehensive protection for your household water. IMPROVE WATER USE HABITS: Hard water often affects your shower experience, leading to the buildup of limescale. By using this filter cartridge showerhead, you will completely enhance your water usage habits, reduce limescale issues, and enjoy a smoother flow of water. The shower filter cartridge efficiently removes contaminants from the water, helping you avoid the potential problems associated with urban water sources. 4 Pack 20-Stages Filter Filter Replacement Cartridge for Water Soften Shower Head