This is a 7SW550 DINOFIN VOLAN fin. It's a special order fin from Holy Smoke in Yokohama. It was designed and developed for classic logs and small waves. The design is by Francois L artigau. The material is volan cloth. Size: Base approx. 16cm Height approx. 20.7cm Although unused, this is a used item, so please refrain from returns and no claims.