Make from activated carbons and PP cotton can effectively remove impurities and odors from water They protect the longevity of your machine and are the perfect addition to your coffee accessories Helps to remove chlorine and heavy metals from water, making your drinking safe and stable The filter is and change Replace it every 2 months ( more often with hard water) to keep the of your coffee machine consistently at a high levels Specially designed for coffee machines,, not need for additional tools, and easy replacement