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The Filbur FC-0131M is the replacement filter for the UNICEL 4CH-24RA R.
Guaranteed to fit or your money back!
The Unicel 4CH-24RA Comp. Replacement Pool Filter measures 4 5/8" x 9 3/4" with 25 square feet of media area. This pool filter cartridge, also known as the Filbur FC-0131M, has a Closed top hole and 1 1/2" MPT bottom style, as well as a Crescent Handle Blue top style. This Unicel pool filter improves pool & spa water quality through Microban technology, which fights against bacteria, odors, and mold growth.