This replacement filter cartridge comes with the technical specifications as Unicel # C-7490, Pleatco # PA137, Filbur # FC-1297 and OEM # CX1380RE. It is a great quality filter cartridge can handle the top load of 137 sq ft. With 3 inch open holes both at top as well as bottom this filter is most suitable Hayward Super-Star-Clear C5500, SwimClear C5520. It is 32 13/16 inch long and 7 inch wide and provides you dust, sand and worm free clean and clear water for your pool and spas.