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The Filbur FC-4002 is the replacement filter for the Dough 312-1003 R.
Guaranteed to fit or your money back!
The Doughboy 312-1003 Comp. Replacement Pool Filter has a diameter of 6 15/16 inches, and a length of 22 3/8 inches. This spa filter has a closed top with a string handle, and an open bottom with a diameter of 2 3/8 inches. This pool filter cartridge will keep the water in your pool or spa clean and clear.