Set of C-Drive thruster fins , size large , made in performance glass construction, flat foil with slight bevel on the front edge of side fins. These fins have a lot of drive and projection out of turns but due to the reduced width in the centre section of the fin they still perform tight turns good on most board types also good to pair with smaller quad rears for more down the line speed Height = 120mm Base = 138mm Foil = flat sides - 50/50 centre Stiff flex pattern