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The Filbur FC-3830 is the replacement filter for the Muskin A3816 R.
Guaranteed to fit or your money back!
The Muskin A3816 Comp. Pool & Spa Filter Cartridge is a spa filter cartridge that measures 6 1/4" in diameter x 8" in length with 2 3/8" Open top & bottom styles. This compatible Muskin Spas filter purifies swimming pool and spa water through 16 sq. ft. of media area.