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Hurricane Filter Cartridges for Hayward Super StarClear C4000, SwimClear C4020 Filters -Pack of 4 filter-length_11 7/8 inches This is a Zodiac G57The 4 Pack of Hurricane HF7487 04 Advanced Cartridge Filter replacements have dimensions for Hayward Super StarClear C4000, SwimClear C4020, and Super StarClear C4000S. They are identical to Unicel C 7487, Pleatco PA100N, and Filbur FC 1270. The original manufacturer's names and part numbers are for reference only. Hurricane's advanced point bond filter media has tighter filtration capabilities than trilobal media material or classic nonwoven media.