The F4 Blackstix is a small size Speed Generating surf fin for wakesurf with a Ride Number of 9.6.
The springy flex pattern of the Blackstix construction combined with the V2 Foil give this fin an ultra lively feel. It's the ideal choice for creating speed in smaller waves. Perfect fin for your Doomswell setup or other boards that accept this type of fin setup. Comes in a Thruster set of 3 fins.
Side Fins Center Fin Area 14.22 14.22 Height 3.37 3.37 Base 4.22 4.22 Foil V2 SYMM