Replacement Inflatable SUP Fin Box

Replacement Inflatable SUP Fin Box fin slot The dorsal fins of tuna can be folded into a dorsal slot when not needed Folding of the dorsal fin can control its sweep and move the aerodynamic find a slot machine Slot Boxes use two specially designed side screws to lock the fin in place These screws hold the fin in and also apply sideways pressure This

find a slot machine fin slot , this being the ordinary condition with a centre

finn slot  Surfboard fin box for laminating into surfboards Made for 40 years by Fins Unlimited The Futures Fin Box - the world's strongest & lightest fin system Installed pre-lamination, Futures Fin Boxes are the choice for strength & durability