UNIVERSAL FIT AND - For use with all 1.0, 2.0 and coffee machine. Including all older coffee makers manufactured after 2007: Kuerig Single Cup Reservoir Brewing, K-Duo, Elite, Classic, Ultra, Special Edition, Ultimate, , K40, K45, K50, K55, K70, K200, K250, K400, K475, K575, BWF100 and more. (FULL LIST SEE ) - NOTE: WILL NOT FIT . FINE CHARCOAL FILTRATION - Premium organic activated charcoal granules are designed to increase the exposure to water and maximize the efficiency of filtration and purification. water filters replacements are made of high quality charcoal that purify the faucet waters from harmful contaminants. MICRO-MESH MATERIAL - Precise design of micro-mesh material prevents activate charcoal of escaping and clogging coffee maker. IMPROVES COFFEE TASTE - Activated charcoal is specifically made to improve beverage drinking taste by removing impurities such as calcium, chlorine, sediment and other odors creating a cleaner pure irresistible -tasting coffee while retaining all the necessary minerals for the body. EASY TO REPLACE: Hassle-free and convenient to replace and start to enjoy a TASTY cup of coffee. Color: White Material: fiber + activated carbon + resin Size: 5.5*3.2*3.4cm Package Contents: 6 * coffee machine replacement core Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.