About This MAJOR CONTENTS:12-Pack Replacement Charcoal Water Filter Cartridges fit Keurig Single Brewing System. COMPATIBLE MODELS: Keurig coffee machine purchased after August 2007: Keurig 1.0 Elite,Classic, Ultra, Special Edition, Ultimate and Platinum series, Keurig 2.0 K200, K300, K400, K500 series. PACKING ADVANTAGE: Each water filter refill is individually sealed to avoid exposure to air, one year supply to pre-store and exchange easily and regularly. PREMIUM FILTRATION: Keurig charcoal water filters reduce impurities, calcium, chlorine and odors, creating the best-tasting coffee. FOR BETTER TASTING BEVERAGES: Replace the Keurig water filter every 2 months or every 60 water tank refills, replace it more often, if you have hard water in your area. Overview Material : Charcoal Brand : Geesta Shape : Basket Number of Pieces : 12 Compatible Devices : Keurig 2.0, Keurig K200