Quick view FCS 5.25" FCS Fiberglass Used Twin Fin Surfboard Fin Set These fiberglass twinfin surfboard fins are in epic condition! This fin has a mostly upright performace outline, rather than a dedicated keel shape. Get ready to have lots of drive, and glide in style for miles! Condition: There is very light and minor... Now: $44.99 MSRP: $59.99 Was: Add to Cart