Features: Compatible with Keurig coffee machine that requires water filters. Just insert the filter into the water reservoir to make it work, with no other tools required. Composed of non-woven cloth and activated charcoal.Fine charcoal granules increase the surface area exposed to water and maximize the effective filtration. It can remove chlorine and impurities in water effectively. Coffee tastes better when it meets filtered water. Besides, limescale can be removed to extend the lifespan of your coffee maker. Any problems, feel free to contact us. Honor to serve you! Specifications: Name: coffee replacement filter Color: white Material: non-woven fabrics+activated charcoal Size: 4.8*3.2cm for each Quantity: 12pcs Package information: Size:15*15*4Cm Weight: 207g Package List: 12*coffee filter