Convert a single fin box to fit any FCS fin. Features Shipping Overview Change from a traditional longboard fin to a FCS thruster set up in seconds. Allows your longboard to take a smaller FCS 1 centre fin. FREE DELIVERY to France, Germany, Luxembourg, Italy, Spain, Portugal, Holland, Belgium applies for orders over 80,00 € (excludes Board Covers) For other countries or more info please visit our Shipping Page We offer: Tracking: Quick & easy online tracking. Peace of Mind: All our deliveries are fully insured against damage. Returns: 30 days exchange or refund for unopened items.