Raindisc filtered showerhead delivers better water for a better shower. Reduces chlorine for a full 10,000 gallon. Maximum flow rate of 2.0 (gallons per minute). The cartridge also reduces sulfur odor and scale. Easy-to-install with no tools required. This unit will retro-fit to any existing 1/2" threaded shower arm. Package includes: 1 filter, 1 model No. WHR-140 replacement cartridge (SKU 412783), PTFE tape, cartridge change reminder sticker, installation instructions, and filter change instructions. 5 year limited warranty.