Helps prevent limescale build-up and reduces contaminants including carbon, chlorine, particulates, and lead, which can affect the taste of your beverage - contaminants reduced are not necessarily in all users’ water Water filter should be replaced approximately every 2 months or 50L to ensure your espresso machine is working at its best Fits KitchenAid Fully Automatic Espresso Machines (models KF6, KF7, KF8; sold separately) Model KESWF includes (1) water filter, Weight: 0.1873929227 pounds, Manufacturer: KitchenAid