The Sprite Slim-Line replacement cartridge (model SLC) is NSF certified to standard 177 and contains an exclusive blend of filtration media for a chlorine-free shower experience. This cartridge is rated for up to 6 months (depending on local water conditions) or 10,000 gallons - whichever comes first. Slim-Line Cartridges are used in Sprite's Slim-Line units and current All-in-One filtered shower heads. Color: Clear/Wrap.