Fins by Dolsey are available as sets, or single fin replacements.
Dolsey stocks several sizes of center box fins, in rigid or flex also screw thru sets for softys. 
Dolsey fin replacement sets are stocked in center box, Futures base , FCS and FCS2 base and screw thru fins. 
3" to 5" side sets and single replacement sets are available,  5" thruster sets , 3" side sets and quad sets and fins. B SEE PRICING BELOW
Center fins 6 to 10"  rigid or 9" flexible materials.
Other fin items stocked - Box screws , center screw and plate sets 
 
Wholesale bulk - 800 969 7473 
 
Dolsey for your SUP or surfboard fin needs.