Description Black SKU: ACC1180010 White SKU: ACC1180012 ?Wide compatibility?This sup fin replacement fits most inflatable paddle boards with a slide-in fin system. ?Easy installation?With an ergonomic design and a quick-release detachable system, the paddle replacement fins can be easily slid in and secured. No more screws or tools are needed! Premium Materials, Durability, and Flexibility: The nylon construction gives this sup fin stiffness while also being flexible enough. You don't have to worry about "falling off" and "breaking" so you can enjoy your surfing moments. ?Improve stability and improve safety?ISUP fins can improve the tracking ability of the fins, allowing you to walk in a straight line with ease. Plus, make your skateboard easier to maneuver, making it easier for the paddlers to swivel/pivot. Attention: Please double-check the shape of the bottom of the fins before purchasing fin accessories. The fins currently sold on this website have a smooth bottom and will only work on boards with a smooth fin base. This fin will NOT work with boards that come with grooved fin bases.