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      US-Box Fin


      US-Box Snap-In Fin

      Important: Place the red rubber nubs so that they fit into the recess when inserting the fin. Then push the inserted fin backwards.


      US-Box-Mini Click-Fin

      Important: Only turn the screw in far enough that it touches the fin or comes to rest in the recess and thus blocks the fin. (approx. one rotation 360°)
      If the screw is screwed in to the point of resistance and more, this can damage the thread.