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The Filbur FC-0685 is the replacement filter for the UNICEL 4CH-940 R.
Guaranteed to fit or your money back!
The Unicel 4CH-940 Pool & Spa Replacement Cartridge has an outer diameter of 4 5/8 inches, and a length of 15 inches. This Unicel Pool Filter has a handle style top, and a 1 1/4 inch open bottom with SAE threads. This Unicel 4CH-940 filter contains 40 square feet of Reemay spunbound polyester pleated filter media.