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The Unicel 4CH-23 R is a pool and spa water filter cartridge that is the correct compatible replacement for the following filters:
The Unicel 4CH-23 Comp. Pool & Spa Water Filter has an outer diameter of 4 15/16 inches, with a length of 6 5/8 inches. This Unicel pool filter has a closed top with a knob style handle, and an open bottom with a diameter of 1 1/2 inches and having Male Pipe Threads (MPT). This Unicel 4CH-23 filter contains 25 square feet of filter media.