Surfing Waves

Can anyone tell me what type of fins I need for this board. It is 7" long.
Thanks

Rudi it is an older fin system and you need fins that have the same set up like a centre fin;
lug, bolt and plate.
A little lug on the base of the fin fits into the slot in the box as does the plate the screw goes through a vertical hole and screws into the plate to tighten the whole thing in the position you choose.
Fins may well be hard to find as but deep inside somebody's pile, they will be around.
Good luck.

thanks