These are Future Fins twin fins, size S. For surfing and wakesurfing. Used once for a short time in freshwater. The case was not included from the beginning. From the HP: The GOHARD Flyer series is designed by wakeboarders for wakeboarders, tested by the world's top riders, and proven effective. It is designed to increase acceleration while balancing hold on the bottom and quick release on the top. The unique double "flyer" along the leading edge reduces the area from the wide bottom to the tip, enabling high acceleration. This fin has a very low drag ratio and can generate speed even from a small wake. - Patented dimple technology, similar to that used in golf balls, has been proven to reduce drag by up to 15% and provide maximum board control. - Reducing fin drag improves speed, control, and stability during turns. This allows you to stay in the sweet spot of the wake longer. - 3DFINS' unique ZGLASS manufacturing process produces high-performance paddle fins that are incredibly strong, durable, and provide maximum stability. Once you try 3DFINS paddle fins, you'll never go back. There are two main reasons why golf balls have dimples. First, to reduce air drag, and second, to improve lift. That's why 3DFINS introduced patented dimple technology to all types of surfboard fins. 3DFINS surfboard fins reduce drag and provide maximum control and stability during turns, but above all, they change speed. You should feel the difference from the first ride. You won't be preoccupied with fin performance. Now, you too, GOHARD! You can really feel the improved performance with these fins. I am selling them because I bought a different design of fins this time. I have opened them for photography, but they are unused. Fin System/Fin Box: FUTURES Type: Fins Number of Fins: Twin Fins