Sprite HOC High Output Replacement Filter Cartridge – 3-PackUsed with showerhead models HOB, and HO Fits Sprite high-output shower filters Uses 20 oz. KDF-55 & Chlorgon for maximum effectiveness Filters chlorine, hydrogen sulfide, THMs and radon Carrtridge lasts 10,000 gallons, 1 year for the average family Costs only 6ยข per day for a clean, healthy shower Dimensions: The Sprite HOC filter cartridge is a cylinder that is 2 3/4″ tall and 2 1/2″ in diameter (6.9 cm tall and 6.3 cm in diameter)