Performance

The 24cm US-box fin is designed to fit the centre fin box of :

E-Comp - 9'4" / 10'0" surfboards (boards come equipped with this fin)

Fins are an integral part of any surfboard and the better you become as a surfer the more notice you should take of your fins. They are literally your driving force through the water. At least 20% of your board’s performance is dependant on what sort of fins you’re using and the method by which they are connected to your board.