Superior quality: All water filters are made out of carbon material in order to protect your coffee machine from the damages posed by hard water buildup also eliminate the smell and taste of chlorine, sulfur, and iron as well as some minerals, soften the hard water with progress. Easy and safe: These Breville Espresso replacement filters are incredibly easy to use as they are designed to simplify the filter exchange process. Each water filter is individually sealed with a sufficient amount of resin beads in order to ensure the highest level of satisfaction Compatible with the BES990 Batch 1746 & earlier, BES980 Batch 1751 & earlier, BES920 Batch 1800 & earlier, BEP920 Batch 1800 & earlier, BES900XL, BES870XL, BES860XL, BES840XL, BKC700XL, BKC600XL espresso machines, and so on. FOR THE BEST TASTING: Exchange the replacement water filters every couple of months or every 60 water tank refills, replace them more often, if you have hard water in your area. NOTE: this is not a genuine Breville product.