EHM In-Line Shower Head Filter Bathroom Neg ION Water Softener Purifier. Removes Chlorine and Heavy Metals Remove the chlorine and many kinds of heavy metal effectively. Installation Can be configured with virtually any shower head. Installs  in minutes - no special tools or professional help required - simply  screw into place between existing shower heard and shower arm. Immediately upon use, you will no longer be showering in chlorine. In  about 5 to 7 days, the natural balance of your skin and hair should be  restored, contributing to healthier, softer skin and less brittle hair. Relief from dry skin and scalp. Healthier younger looking skin. Softer more manageable hair. Improved lathering and sudsing. Reduces fading of color treated-hair.