AFC Brand, Water Filter, Model # AFC-EWH-3000, Compatible with Elkay(R)51300C Water Fountain Station Fillers 12-Filters

Works the same as the original elkay filter. The filters are about 1/4 bigger around at the top but that didnt seem to be a problem. They will not work in bubble has filter monitering built in. Most of my filter counts just run on a 365 day schedule.