Unused Keel Twin Fins These are unused fins purchased as spares. Please note that there are minor scratches from the beginning, and a slight molding burr can be felt. Product Details: Set Contents: High-quality twin keel fin set (2 fins). Ideal for surfboards, shortboards, funboards, and longboards. Includes: Fin set, key, comb, and screws. Material Construction: Durable design combining nylon, fiberglass, and carbon composite materials. Performance Features: Designed for a balance of strength and flexibility, enabling explosive speed during turns. Compatibility: Versatile design compatible with three types of fin boxes, allowing installation on various surfboards. Type... Fins Fin System/Fin Box... FCS Number of Fins... Twin Fins