This is an original Delonghi DLS C002 & SER3017 Water Filter for Espresso Coffee Make This filter improves the taste of your hot drinks by removing scale forming minerals, which also improves performance and efficiency. This filter is quick and easy to install and for optimal results we recommend the filter is changed regularly and at least every month and/or 30 days. Compatible with the following Delonghi Espresso and Bean-to-Cup machines: EC850, EC820, ECAM22.110.B, ECAM26.445M, ECAM23.450.S