Deflow Pocket Knife 7.5" - longboard fin - burgundyPocket Knife 75 longboard surfboard fin As the name suggest it, the pocket knife is a perfect utilitarian fin for your single fin or 2+1 board. The base gives stability while the overall template let your surfing get pretty loose, and dynamic. It also allow you to go vertically . This fin can be adapted to a variety of shapes from 6 to mid 7 foot. Flex: Stiff SINGLE FIN BASE (mm) 158. 4 BASE 6. 1 HEIGHT (mm) 190. 5 HEIGHT 7. 5 AREA 27. 26