4) New UNICEL C-7490 Hayward Replacement Pool Filter C-5500 C-5520 FC-1297 PA137 New 4) Unicel C 7490 Replacement Filters Replaces: Hayward CX1380RE SwimClear C5520 / Super Star Clear C5500 Length: 32 13/16" Diameter: 7" Top and Bottom Hole: 3"