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The Unicel C-4431 R is a compatible replacement for the following pool and spa filters:
The Unicel C-4431 Comp. Replacement Pool & Spa Filter is constructed with 30 sq. ft. of pleated Reemay filter media to improve the clarity and quality of your swimming pool and spa water. This compatible Unicel spa filter, also known as the Filbur FC-3078, measures 4 15/16" x 10 3/8" with a Closed top style and 2 1/8" Open bottom style. This pool filter cartridge featurs reinforced antimicrobial end caps and extruded PVC center cores