Removes impurities for better tasting coffee: Traps odors and chemicals like chlorine, fluoride, and chloramine residues while preserving the dissolved mineral salts and calcium that are needed to extract coffee soluble for the best possible flavor Easy to install and use: Simply rinse the new cartridge, place it in the filter holder and snap shut, and return the holder to its spot in the water reservoir; For best results replace every 30 days or 30 brewing cycles Universal design compatible with most brands: Replacement cartridges feature the premium quality you expect from Koolatron products and fit drip coffee makers Ultra fine grain charcoal for max effectiveness: Combination of extra fine organic charcoal granules and micromesh material maximizes water filtration and ensures the charcoal medium and trapped impurities stay inside the filter where they belong Extend the life of your coffee maker: Dissolved elements in your tap water can corrode your coffeemaker's internal plastic and metal components; removing these residues with a charcoal filter will help extend the lifespan of your coffee machine