The FCS II GM Athlete Series fin combines the versatility of the Performer template with a customised flex pattern sitting between Performance Core and Performance Core Carbon. The unified carbon inlay inside the GM side fins creates a bend + twist flex pattern that extends further down the fin and provides a springy and more forgiving flex than PCC. The centre fin features a stiffer twisting flex for drive & directional stability. :: Unisex > Surf Accessories. Base: 4.48 / 113.7mmBoard Types: Recommended for all board typesRecommended Rider Weight: 75Kg - 90 Kg / 165 - 200 LbsFoil: IFTSweep: 33.7Area: 15.58'' / 10054mmDepth: 4.67 / 11âââ€š¬¹8mmFCS thruster finsIdeal Conditions: A wide range of conditions from beach breaks to point breaks. Size: one size.