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The Filbur FC-3740 is the replacement filter for the Lomart F-335 R.
Guaranteed to fit or your money back!
The Lomart F-335 Comp. Pool & Spa Filter Cartridge is a spa filter cartridge built with a 1 1/8" Open top hole and 2 3/8" Open bottom hole. This compatible Lomart filter offers premium purification for your pool or spa through 13 square feet of media area. This pool filter replacement measures 4 3/4" x 18".