Replacement fin box for FCS II fin system.

FCS II fin plugs come with the following cant (angle in degrees the fin leans out) options built in to them:
0º
3º
5º
9º

Below lists common uses for the different degree fin plugs:
0º – centre fins
3º – quad rear fins/longboard trailer fins in surfboards with little concave
5º – quad rear fins/longboard trailer fins in boards with heavy concave or thruster side fins in boards with little concave
9º – thruster side fins in boards with heavy concave