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Amazon.com : Surf Squared Large Fins Set (3 Fins) - Honeycomb Fiberglass - Ride as Twin or Thruster - Performance Surfboard Fins Compatible with Futures Single Tab Surfboards : Sports & Outdoors
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Possibly the best large thruster surfboard fin available online right now for Futures and FCS fin boxes - Lunasurf
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Future Fin Quad Set F4 QD 3.75" (4) Thermotech - Foam E-Z, The Original One-Stop Surfboard Supply Shop
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