The 3M CFS717 is a replacement cartridge designed for the CFS500 System. The 3M CFS717 filters out sediment and chlorine, providing better tasting and smelling water. In addition, it prevents the build up of scale. Ideal for use in coffee and hot tea applications, as well as with ice machines. The 3M CFS717 features a compact design for convenient point-of-use filtration in tight spaces.