NCI ECO Ultra Filter Replacement Set for Tyent MMP 5050/7070/9090/11 Water Ionizer This is a set of "ECO Ultra" replacement filters (not "Tyent Ultra" filters) Fits MMP countertop ionizer only. Will not fit ACE or UCE series ionizers. These filters have a 951 gallon cycle (equivalent to 6 months at 5 gallons per day usage rate) Certified to NSF42 Filtration Standards. Ultra Filtration +10% More Carbon.