BLACKFIN Flip Lock River Fin

• The side fins that come with the board can be removed or left in, depending on individual preferences and need while using this Universal 4.5" River Fin.

Please Note: Older boards 2021 and older may not be fully compatible with new replacement fins. If you need to make small adjustments to the length of your fin to achieve optimal fit, we recommend filing the edges of the fin with sandpaper.