The package contains 4 BES880 espresso machine replacement water filters. To activate the filtration function of the BES880 water filter, completely immerse it in water for 5 to 10 minutes before use and squeeze it properly to produce bubbles, which will make your Breville espresso machine work better and improve the taste of coffee. Our BES881 water filter designed for Breville barista touch BES880BSS combines natural ion exchange resin and activated carbon to reduce scale, stabilize calcium carbonate and remove impurities that affect coffee flavor and aroma, thereby enhancing the taste of hot drinks. Let you experience the aroma and atmosphere of a coffee shop without leaving home. Our 4-pack Breville espresso machine replacement water filters use advanced technology, using coconut activated carbon adsorption and ion exchange technology to reduce chlorine, heavy metals and other harmful contaminants in water, thereby maximizing the flavor of coffee beans. The package contains 4 individual replacement water filters, and it is recommended to replace them every 3 months for best results. Monthly tracking dial shows when the water filter needs to be changed. Water filter is made from FSC certified paper.