The Futures Fins Box Filler Plug eliminates the void left behind when you're not using all of your fin boxes. If you have a 5 fin set up or a longboard with a 2 + 1 set up, try adding the Futures Box Filler Plug in your empty fin boxes to help you reduce drag and add flow.
The Futures Box Filler Plug comes in two sizes, 3/4'' which fits the standard Futures side boxes, and the 1/2'' which will fit into the Futures center box.
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