Futures QD2 4.0 Techflex Quad Rear Fins, Medium, Turn a Thruster Into a Quad

Futures QD2 4.0 quad rears in Techflex. Pair these with any Futures front fins and your thruster set becomes a quad. Cheapest way to get a second setup out of fins you already own. Techflex is stiff like fiberglass but lighter than honeycomb. Symmetrical foil, ride number 6.5, so it stays loose and predictable rather than adding a lot of drive. These favor boards with the rear boxes set closer to the stringer, away from the rail. Medium, roughly 145 to 195 lbs. Sold as a left and right pair. Discontinued in Techflex. Futures only does the QD2 in Alpha and Thermotech now. Futures base, fits any Futures box. $60 new. Condition: used and surfed, no cracks or chips. Normal wear. I'll remove the listing when sold. Cash or Venmo, local pickup at Shell station (3535 India St, San Diego, CA 92103)