FCS II KA Performance Core Tri Surfboard Fins - Medium/Black AcidThe FCS II KA Performance Core Medium Tri Fin Set. The FCS II KA PC Medium Tri Fin Set delivers a lively mix of drive, pivot and tail release. Features Overview: Kolohe Andino's signature fin delivers a lively mix of drive, pivot and tail release. Designed for performing fast, explosive turns and airs on and above the wave. Ideal Conditions: A wide range of conditions, particularly good in critical overhead waves. Board Types: Designed to fit the FCS