Rainbow Fin Co. Justin Quintal Flex 7.5" Longboard Fin - ClearThe Justin Quintal Flex is Justin Quintals longboard fin for the more modern riders looking for maneuverability and pop. The design of the fiberglass fin is generally vertical with a narrowing out to the tip that has slightly less rake than the Mikey DeTemple Flex Fin. As its name suggests, the JQ Flex also has flex in the tip that means less hold and the ability to hit bottom turns and carves just that much more quickly, while not sacrificing speed