Culligan ISH-100 Inline Filter for Use with Existing Shower Heads, White, Single Unit 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