The shower filter has certified performance in a sleek, high-strength plastic housing. Inside the housing is a replaceable 12-month filter cartridge (model HOC) which contains Sprite's exclusive blend of filtration media for a chlorine-free shower. It can be placed between an existing showerhead and any standard 0.5" NPT shower arm with no extra equipment, offering complete customization of the showering experience. This listing is for the filter (containing one replaceable filter cartridge) only. It has a 1-year manufacturer's warranty with proof of purchase.