Tab Infill Kit

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FCS II Compatibility Kit To fill the gap between the front tab of the original (dual tab) FCS fin and the front of the FCS II plug front slot. There is a slight difference between Futures and FCS keys. one is Metric, the other is US system. They will both work, but one can strip out if too much torque is used. FCS grubs are smaller than Futures, both in diameter and length. Show more