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The Unicel C-9999 R is a compatible replacement for the following pool and spa filters:
The Unicel C-9999 Comp. Pool & Spa Filter Cartridge is a replacement pool filter cartridge that purifies swimming pool and spa water through 100 square feet of pleated Reemay filter media. This compatible Unicel pool filter, also known as the Filbur FC-3106, has a 3" Handle 123 top style and 3 1/2" Color Correct bottom style, and measures 2 3/4" x 3 11/16".