FIN SIZE * X SMALL (Grom) (under 45Kg / 100 Lbs) * MEDIUM (65 - 80Kg / 145 - 175 Lbs) DETAILS * Controlled * High Speed Turning * Excel in Critical Conditions * PC Construction (Performance Core) * Available in Various Sizes * Oversized, all-round fin for a diverse range of surfers. * Functional template with flat foil on the side fins delivering fast, controlled directional changes. * Designed for surfers who like to attack the wave and surf with energy and power on critical parts of the wave. The FCS II Accelerator PC (Performance Core) Thruster set Surfboard Fins are designed for surfers that like to attack the wave and surf with energy and power in the critical sections of the wave. This functional template has a flat foil on the side fins that offer controlled directional changes. The Performance Core construction is great if you want an all round/works in everything feeling fin