Futures TMF-2 Thermotech Fin - No Longer Manufacturing The TMF-2 is a smaller-based trailer fin (guitar pic) for use as a 5th fin option, adding just a little more control to your favorite twinnie or quad. Alternatively, you could use two of them, (these are sold as singles) as quad rears on those days with smaller surf to make your surfboard more slidey. Made in Huntington Beach, CA. USA. The Thermotech product line does not have the traditional plastic feel of a composite fin. Instead, they have a consistent flex that creates drive and release through turns. Thermotech fins come with the Futures Truss Base, making them lighter and stronger. Template Category | Wide-base Trailer Construction | Thermotech Size | X-Small Trailer Centre Fin Area 4.1 Height 2.00 Base 2.80 Foil SYMM