Charcoal Water Filters for Keurig single Cup Brewers by Brewslang (12Pack) NANO GRAIN - Finer charcoal granules increase water exposure surface area, maximizing the filtration process, resulting in a better cup of coffee MICROMESH - Ensures the charcoal stays in the filter and does not clog up your single cup Keurig coffee maker. Brewslang charcoal filters are of the highest quality (FDA certified) - Package includes (12) Charcoal Filters ENHANCES FLAVOR - Our activated charcoal filters remove impurities, calcium, chlorine, and odors from water, helping create the better-tasting beverages UNIVERSAL FIT - These Keurig compatible filters made by Brewslang will fit all Keurig coffee makers, including Keurig 2.0 machines as well as Keurig Single Cup Reservoir Brewing Systems and any other Keurig single cup brewer that use a charcoal water filter hoder COMPATIBILITY - K200, K225, K250, K260, K275, K300, K325, K350, K360, K375, K400, K425, K450, K460, K475, K500, K525, K550, K560, K575, K600, K625, K650, K660, K675, B40, B41, B44, B45, B50, B55, B60, B65, B67, B72, B76, B77, B79, B140, B145, B150, B155, B200, K40, K45, K50, K55, K60, K65, K70, K75, K77, K79, K145, K150, K155 - all Keurig Hot Models  Brewers made after 08/2007: Elite, Classic, Ultra, Special Edition, Ultimate & Platinum