Blendin 10 Pack Replacement Charcoal Coffeemaker Water Filters, Fits Cuisinart DCC-RWF1 Coffee Makers Charcoal water filter removes impurities: chlorine, calcium, bad tastes and odors Great tasting water makes great tasting coffee Each filter individually bagged and sealed to ensure brand new quality. (No Retail Box) Cuisinart recommends changing the water filter every 60 days or 60 uses, more often if you have hard water