Unicel C-4326, Filbur FC-2375, SD-00196, SD-00657, 303909, M-4326, 8172500, R173429.(Part number of manufacturer just for reference only, all right reserved.)
High filtration performance, collect impurities easily by the filter cartridges.
Simple replacement for the cartridge filter, recommended to clean the filter every 2 weeks. Just need take our from your spa skimmer and rinse cartridge with a hose.