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Two-pack replacement cartridge set for Rainbow DSF 50 filter systems. Each Filbur cartridge measures 4-15/16″ diameter x 6-5/8″ long, providing 25 sq ft of filtration (50 sq ft combined). Cross-references Unicel C-4401 and Pleatco PRB25SF-PAIR. Antimicrobial Reemay media for superior filtration. Replace both cartridges together for even water flow.
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🇺🇸 Ship from USA · On Agora since 2026
$21.99