4) Unicel C-7494 Hayward CX1280XRE Swimming Pool Replacement Filter Cartridges Price is for 4 filter cartridges 4 New Unicel C-7494 Replacement Filters Diameter: 7-1/16" Replaces: Hayward CX1380RE SwimClear C5520 / Super Star-Clear C5500 Length: 32.75"