The Brita Pitcher Replacement filter cartridge fits the Brita Pitcher Classic, Riviera, Slim models and other Brita products that call for the OB03 filter cartridge. They should be changed every 40 gallons or 2 months. Works with the following Aqualux, Atlantis, Classic, Chrome, Deluxe, Grand, Riviera, Slim, and Space Saver models. Water filter Eliminates 99 percent of lead Reduces chlorine bad tastes and odors Prevents bacteria growth in filter Reduces sediment and water hardness Each filter has a 40-gallon capacity