Quick view FCS II FCS II H4 Thruster Fin Set - Large - Used Surfboard Thruster Fin Set CONDITION: These lightly-used FCS II H4 thruster fins from are in excellent condition. A few very small scrapes and scuffs, but nothing at all that will negatively affect the fins' performance. These... Now: $89.99 MSRP: $125.00 Was: Add to Cart