Riddle flex fin made of fiberglass. ■ 8.5" ■ volan cloth ■ HANDCRAFT by Larry Allison ■ Purchased new at a Tokyo shop in 2025 and used only once. I believe there are no noticeable scratches, but please understand that this is a used item. ■ It's interesting to use as a spice for displacement hulls or regular mid-length single fins. Displacement hull Riddle Fin system/fin box... Center fin box Number of fins... Single fin