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The Filbur FC-3910 is the replacement filter for the Hot Springs 31233 R.
Guaranteed to fit or your money back!
The Hot Springs 31233 Comp. Pool & Spa Replacement has a diameter of 5 1/8 inches, and a length of 10 1/4 inches. This spa filter has an open top with a diameter of 1 5/8 inches, and an open bottom having a diameter of 1 9/10 inches, with slots. This pool filter cartridge will keep the water in your pool or spa clean and clear.