Materials:Provide fresh and delicious-tasting water for coffee with the advanced ion-exchange resin and granular activated carbon. Easy to use：Before the filter is used for the first time, it is necessary to rinse the filter, just to rinse out the carbon dust. If it is started to rinse out the carbon dust, it is normal. Service life： Replace your water filter every 2 months in order to ensure the continuation of the fresh water. Design: Easy to install and operate, and does not require any tools, saving time and effort. Compatible models: Replace Delongie filter models, including ECAM and ETAM coffee machines, and conventional pump coffee machines of the EC680 and EC800 series.