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The Filbur FC-2324 is the replacement filter for the Unicel C-2303 R.
Guaranteed to fit or your money back!
The Unicel C-2303 Comp. Pool & Spa Cartridge is constructed with pleated Reemay filter media and reinforced antimicrobial end caps. This pool filter cartridge improves water clarity and quality through 9 square feet of premium media. This compatible Unicel spa filter, also known as the Filbur FC-2324, measures 2 7/8" x 17 1/16" with 2 1/8" Open top and bottom styles.