Dorsal Carbon Hexcore Thruster Surfboard Surf Fins (3) Honeycomb FUT Base Red This Futures Brand Surfboard Fin Box Compatible Red Carbon Thruster Set allows for a moderate amount of flex at the tip that while having a lighter material the flex pattern still allows you to have sharp transitions through turns the inside foil technology provides maximum hold in turn performance. Another favorite of the pros and beginners alike this fin will suit the any surfer or those who want to push themselves to the limit. For surfers in the 100 to 195 pound range. Base: 4.41 / 112mmDepth: 4.74" / 120mmArea: 15.26" / 9847mm Sweep: 32.9 Foil: 80/20