Quick view FCS II FCS II Matt Biolos Air Core Thruster Fin Set - Used - Medium CONDITION: These used FCS II Matt Biolos thruster fins are in excellent, near-perfect condition with hardly any evidence of use. Save buckets of $$$ compared to new! FROM FCS: Design by Matt Biolos and refined by his diverse stable of elite team riders,... Now: $99.99 MSRP: $170.00 Was: Add to Cart