Charcoal Water Filters, Replaces Keurig 05084, 2 sets. Set of 2 active charcoal water filters helps ensure deliciously fresh home-brewed coffee Removes chlorine, odors, calcium, and other water impurities prior to brewing Each filter individually bagged and sealed to ensure brand new quality. (No Retail Box) recommends changing the water filter every 60 days or 60 uses, more often if you have hard water