The Firewire 5-fin set from Futures was designed with a solid carbon base to increase drive through turns along with a bamboo/honeycomb core to create a lively flex for release. Though having a lot of surface area, these fins feel like a smaller set of fins when used as a thruster. When riding this set as a quad, the rear fins act as a pivot giving you tighter radius than a traditional quad set. Comes with five fins and a fin key.
Side fins height is 4.90" and base is 4.50". Quad rear fins height is 4.35" and base is 4.10"