Culligan ISH-300 Inline Shower Filter for Use with Existing Shower Heads, Brushed Nickel Finish Inline shower filter system (shower head not included) Allows for continued use of existing shower head, fits standard 1/2" thread shower heads Shower head and filter are easy-to-install, no tools required Includes WHR-140 filter cartridge: WHR-140 filters sulfur odor, chlorine, and scale for a full 10,000 gallons or 6 months giving softer, cleaner skin and hair Patented filter media bacteriostatic*, limits passage and growth of bacteria for a cleaner shower experience System tested and certified by NSF International against ANSI Standard 177 Installs on any standard 1/2" threaded shower arm