12 activated carbon filters: These activated carbon filters can improve water quality by reducing limescale and removing harmful substances. Please note the size. Improved coffee taste with filter cartridge: Drinking water is purified by carbon from suspended particles and other mixtures. A delicious coffee taste and aroma are required. Superior water purification performance of replacement water filter: Compared with traditional filter granules, our super fine carbon particles lead to a larger water filtration area. This improves the water purification performance. Machine maintenance with water filter: Activated carbon filters reduce calcium and chlorine content, thereby reducing the wear and repair frequency of the coffee machine and extending the service life of the machine. Tips: Hengsong activated carbon filter in coffee machines should be replaced every 2 months. We suggest not to extend the descaling time despite the filter. Note: The data are all measured manually, please