Each water filter is individually sealed with a sufficient amount of resin beads in order to ensure the highest level of satisfaction All water filters are made out of resin Made of high-quality resin which is certified against WQA and ISO9001 standard. Features New, individual package of each filter. Made of high-quality resin which is certified against WQA and ISO9001 standard. Superior quality: All water filters are made out of resin in order to protect your coffee machine from the damages posed by hard water buildup also eliminate the smell and taste of chlorine, sulphur and iron as well as some minerals, soften the hard water with progress called ion exchange. Easy and safe: These 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 Recommended you change the filter every 2 months along with descaling. NOTE: this is not the genuine Breville product. Package Includes 4x Water Filter Compatible with the Oracle Touch (BES990 - Batch 1747 & up) the Oracle (BES980 - Batch 1751 & up) the Bambino Plus (BES500) the Barista Pro (BES878) the Barista Touch (BES880) the Dual Boiler (BES920 - Batch 1801 & up) the Dynamic Duo (BEP920 - Batch 1801 & up) Disclaimer: Please check your existing filter or machine batch code to ensure that the machine is compatible.