This Replacement filter cartridge complies with the technical specifications as Unicel # C-4345, Pleatco # PST45, Filbur # FC-2660 and OEM # C4345. This 14 7/8 inch long and 4 15/16 inch wide filter cartridge is capable of handling the top load of 45 square foot is best fit for Santanna, Conger Bros. By installing this filter cartridge you complete protection from germs and sand in your pools and spas. This filter is closed from its top while has open hole of 2 1/8 inch at its bottom. This high quality filter cartridge provides you clean and clear water and is made superior grade of materials.