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The Filbur FC-3088 is the replacement filter for the Unicel C-6603 R.
Guaranteed to fit or your money back!
The Unicel C-6603 Comp. Replacement Spa Water Filter is a pool filter cartridge replacement measuring 6" x 14 3/4" with a closed Crescent Handle top style and 1 5/8" Open bottom style. This compatible Unicel spa filter, also known as the Filbur FC-3088, purifies swimming pool and spa water through 35 sq. ft. of pleated Reemay filter media.