F4 Alpha 5-FinFutures F4 Alpha 5 Fin The F4 Alpha 5 fin is a small sized set in the Neutral template category. Made in Huntington Beach, the Alpha product line combines Bureos NetPlus recycled fishing nets with Futures Compound 6 carbon and air infused technology, offering stability and control at top speed. The rear fins are QD2 3. 75 with Symmetrical foil. The 5 fin set is designed to be ridden as either a Thruster or Quad set up, packaged together for more