Intex Recreation 29000E 2, 59900, 59900T, 59900W Intex Type A or C Filter Cartridge for Pools, White Type A Filter Cartridge Intex filter cartridges are made from Dacron material. They are easy to clean and to replace when necessary, usually after about two weeks. Look for the large A on the package to make sure you are getting the right size for your filter For smaller pumps: 530 gallon per hour - 1,500 gallon per hour Fits pumps with both Type A and Type C filters For filter pump item numbers: 586035860456637566385663556636 Replace filter cartridge with a new one every two weeks for best results