FCS II Harley Ingleby HIBT Twin Fin SetThe FCS II Harley Ingleby Twin Fin Set delivers high area performance for strong turning power with a moderate sweep, full tip, and long base that generate drive and speed while the lower depth keeps the feel loose and responsive. Designed for the HIBT 3+3 model, this set becomes part of a wider system that allows quad, twin, and asymmetrical setups when paired with the Harley Ingleby HIBT Quad Set, which is sold separately. The fins work with the FCS