Superior Filtration: for bwf100 Filters designed with less than 0.5 Micrometre small pore size with multi-stage charcoal filtration,proves to 99% remove calcium, chlorine, bad odors and harmful contaminants. To good protection for your coffee maker! -keeping Packaging -Each for filters is individually sealed with minimal packaging to replacement filters for best coffee taste. COMPATIBLE FOR all MACHINES - BES920XL, BES980XL, BES900XL, BES860XL, BES870XL Espresso & BES840XL Infuser Espresso Machine and BKC600XL & BKC700XL Gourmet Single Cup . MULTI-STAGE FILTRATION: Charcoal water filter removes off-tastes and odors in addition to particles, , cysts, chlorine, organics and lead, advanced quality resin can protect your for coffee machine from the damages posed by hard water buildup. FOR THE BEST TASTING BEVERAGES: Replace the alternative filter every 2 months or every 60 water tank refills (sooner if you have hard water). Regular replacement of water filter keeps brewed coffee and full of flavor.