2022 HEXCEL COREMAT FINSETPerformance Surf Code: 85005. 220070 Includes: 3 fins, fin key, 6 grub screws. Lightweight hexagonal core thruster fins are designed to maintain the flex characteristics of a glass fin with an optimum strength to weight ratio. The custom fin base shape requires no infills when using FCSII Fin Boxes. Large fins are more raked and carve well withhold. Medium fins are more upright with less tip area, creating minimal drag for more speed and release.