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The Filbur FC-3965 is the replacement filter for the Caldera 1039607 R.
Guaranteed to fit or your money back!
The Caldera 1039607 Comp. Pool & Spa Filter Cartridge has a diameter of 8 inches, and a length of 16 1/2 inches. This spa filter has a closed top with a handle, and an open bottom with a diameter of 3 3/4 inches. This pool filter cartridge will keep the water in your pool or spa clean and clear.