【Alkaline Mineralization Filter Replacement for X12-Alkaline, X16 RO System】tested and certified by IAPMO R&T against NSF/ANSI 58 &372 standard, and tested by SGS to reduce harmful substances.【 Professional Filtration】 This water filter features 4-stage precision filtration including an activated carbon layer and alkaline mineralized layer. It adjusts your water’s pH to an optimal 7.5± to deliver healthy, pure water for you.【Healthy Alkaline Minerals】 This undersink ro system uses innovative healthy boost-tech to infuse alkaline minerals such as Ca, Mg, etc. Not only enhances your health, and strengthens your bones, but also elevates your cooking and drinking flavours.【Eco-wise Water Choice】 Long-lasting 12-month filter lessens replacement hassles and helps the planet, making a sustained clean water supply.【Easy Replacement】 This water purifier is designed with an automatic water shut-off function when replacing it. No tools needed, just 3s quick replacement so you always have access to clean, refreshing water at home.