This 4-pack of replacement water filters is designed for Sage/Breville espresso machines, including the Barista Express (SES875), Barista Pro (SES878), Barista Touch (SES880), Oracle (SES980), Oracle Touch (SES990), Dual Boiler (BES920), and Duo-Temp Pro (BES810). Please verify your machine's model and batch code for compatibility. Not compatible with Bambino Plus models (BES500/SES500/SDC450/SDC400). The filters feature a BPA-free plastic casing with an internal filtration layer of natural coconut shell activated carbon and cation exchange resin. This combination effectively reduces impurities, limescale, chlorine, odors, volatile organic compounds, and heavy metals like lead and mercury from your water. The sodium-free exchange resin softens water while retaining beneficial minerals, which can help improve the flavor of your coffee and protect your machine from scale buildup. Certified to NSF TV standards based on Regulation 1935/2004/EC and DIN 10521:2009. A micro-porous grid and PP cotton layer prevent small particles from entering the purified water. For best results, soak each filter underwater for 5 minutes before initial use. It is recommended to replace the filter every 3 months for optimal performance. This pack of 4 filters provides a convenient 12-month supply. Each filter is individually sealed. We are committed to providing a premium quality product and excellent customer service.