This Replacement filter cartridge replaces Unicel # C-7483, Pleatco # PA81, Filbur # FC1225 and meets the OEM # CX580XRE specifications. This 19 5/8 inch long and 7 inch wide filter cartridge has 3 inch open holes both at the top as well as bottom. It is capable of handling the top load of 81 sq ft and most suitable for Hayward Super-Star-Clear C3000S, SwimClear C3020, Super-Star-Clear C3000, SwimClear C3025. By installing it you get complete protection from Sand, Dust and Worms in your pools and spas. It is a great filter cartridge and made of superior quality of materials.