Thruster Surfboard Fins (3 Fins) - Perfect Flex with Honeycomb, FCS or Future Sizes Fits any surfboard that uses FCS or Future fins (select which kind) - whether it's a shortboard, funboard, or longboard. Honeycomb Fiberglass design provides the perfect amount of flex. Drive down the line on a fast pointbreak, launch aerials (if you're lucky enough to be that good), or just rip some turns at your local beachbreak. High-performance fins at a low price. We don't spend millions of dollars sponsoring pro surfers... instead we pass the savings onto you. Lightweight, responsive, and fast. 1 Year Warranty - Push it to the limit! If your fins break, we'll replace them for free.