Improving coffee flavor - Coconut shell activated carbon has developed pores and good adsorption properties, which can effectively remove impurities, scale, odors, residual chlorine, volatiles, and heavy metals (Pb, Hg), ensuring deep purification of clean water, softening water with sodium free exchange resin, and retaining minerals that are crucial for maintaining a balanced diet and healthy lifestyle.NSF Television Certification - Certification Basis: Regulation 1935\/2004\/EC and DIN 10521:2009. The exterior of the sage water filter is made of plastic that does not contain bisphenol A, and the internal adsorption filter layer is filled with natural coconut shell activated carbon and cation exchange resin. Micro porous mesh and micro porous PP cotton can prevent small particles from entering purified water.Coffee machine friendly - Sage water filter can adsorb sediment in tap water, effectively reducing the risk of scaling in the pipes inside the coffee machine. Kind reminder: We recommend replacing the water filter every 3 months. (Set reminders on the filter)Compatibility - Sage Barista Express (SES875- Batch 1735 and above), Barista Pro (SES878), Barista Touch (SES880), Oracle (SES980- Batch 1750 and above) Oracle TouchSES990 Replacement water filter for Italian espresso machines with dual boilers (BES920 batch 1749 and above) and Duo Temp Pro (BES810 batch 1738 and above). Not applicable to Bambino Plus BES500\/SES500\/SDC450\/SDC400. Please check your existing filter or machine batch code to ensure filter compatibility.