Futures Fins - Rusty R1 Blackstix 3.0 Thruster Thruster fin set (3-Fin) Recommended for Large Size Surfers - 180lbs+ (80kg+) Futures Ride Number rating of 9.5 - Speed Generating For springy fluid and responsive surfing Area Specs - Side Fins: 15.23sq in - Center Fin: 14.55sq in