Intex N/AA Type A Easy Set Pool Filter Cartridge (18-Pack) | 29000E (59900E (18) Genuine Intex type a filter cartridges Made for the 500, 530, 800, 1000 & 1500 gal/hr filter pumps models 58603E, 58604E, 56635E, 56636E, 56637E, 56638E & 58623 Intex filter pumps or "Krystal Clear TM" filter pumps models 02 & 12R Replace your type a filter cartridge as often as every two weeks for a sparkling clean pool! Product Dimensions: 8"H x 4.25"W Manufacturer Part Number: 59900E