4) New UNICEL C-7490 Hayward Replacement Pool Filter C-5500 C-5520 FC-1297 PA137
This is a Four Pack of Hayward C-7490 Filters. These filters replaces Hayward CX1380RE SwimClear C5520 / Super Star-Clear C5500.  These filters are the same model as Pleatco PA137 and Filbur FC-1297.