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The Rainbow 17-2606 R is a compatible replacement for the following pool filter cartridges:
The Rainbow 17-2606 Comp. Spa Filter Replacement is a spa filter cartridge that effectively improves swimming pool and spa water quality through a combination of premium media and 35 sq. ft. of area. This compatible Rainbow filter offers dimensions of 4 15/16" x 4 5/8" and 2 1/8" Open top/bottom styles.