<h3>Key features</h3><ul> <li>MAJOR CONTENTS:12-Pack Replacement Charcoal Water Filter Cartridges fit Keurig Single Brewing System.</li> <li>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.</li> <li>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.</li> <li>PREMIUM FILTRATION: Keurig charcoal water filters reduce impurities, calcium, chlorine and odors, creating the best-tasting coffee.</li> <li>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.</li> </ul><p>Free shipping on orders $50+. 30-day hassle-free returns.</p>