Use this as the first filter in the NanoCeram-POU-3 under counter unit.These are gradient density for longer life melt blown polypropylene sediment pre-filters. There are three layers of filtration, outer layer is 20 micron, second layer is 5 micron and the inner layer is 1 micron. NSF component, shrink wrapped for purity with the micron rating molded into the cartridge.
This price includes 3 pre-filters.