Futures Fins Thermotech TMF-1 Trailing Fin - 5-Fin SteupThe TMF 1 is a wide based trailer fin for use as a 5th fin option, adding just a little more control to your favorite quad. Made in Huntington Beach, 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. Template Category Wide base Trailer Construction Thermotech Size X Small Trailer SPECIFICATIONS Center Fin Area 4. 85 Height 1. 76