- 6PCS Water Filter Cartridge for Coffee Maker- Made of high quality resin, NSF/ANSI Standard 42 certified.- Compatible with BES980XL, BES920XL, BEP920, BES900XL, BES870XL, BES860XL, BES840XL, BKC700XL, BKC600XL espresso machines- Superior quality: All water filters are made of resin to protect your Breville coffee maker from the damage caused by hard water deposits; they also eliminate the smell and taste of chlorine, sulphur and iron as well as some minerals, softening the hard water with a process called ion exchange.- Simple and safe: These Breville Espresso replacement filters are incredibly easy to use as they are designed to simplify the filter replacement process. Each water filter is individually sealed with a sufficient amount of resin beads to ensure the highest level of satisfaction.- Breville recommends changing the filter every two months.