9.5" Kumano System SUP/Longboard fin replacement. This fin can be used in all our Doyle boards. Included with this fin is the typical installation screw/washer and two Kumano Ai plugs. Use the Ai's in your fin as a substitute for the screw and washer for a tool free fin installation! As usual, this fin will keep your board tracking straight and will keep you from spinning out when you turn.