GENERATION 5 FIN - F4 (S)The F4 Generation Series 5 Fin set, is a small Speed Generating quad thruster combo with a Ride Number of 7. 0. The latest in speed generating fins, the Gen Series features a V2 foil for fluidity and a unique blend of uni directional carbon and fiberglass for a more stable flex pattern. The F Series templates feature a good balance of height, base and area for a bit more stability, and the quad rears feature an 80 20 foil and pair perfectly with any