Futures Controller Alpha Series Quad Fin Set - Carbon / Grey A large size quad set designed specifically for the classic, wide-tailed retro board - effectively a split keel The Controller Alpha is a large size quad set with a Ride Number of 5.7. Designed specifically for the classic, wide-tailed retro board the Alpha Controller is effectively a split keel and offers a unique blend of twin and quad characteristics. The V2 foil and large surface area create both drive and control, while the upright rear template mixes in a skatey feel to the set as a whole. All Alpha products are designed and manufactured exclusively in Huntington Beach, Ca USA. Alpha fins are made with a special composite designed with the help of 3M. It's carbon and air infused, and it's super lightweight. Side fins Area 18.24 Height 4.50 Base 5.05 Foil V2 Rear fins Area 12.06 Height 4.53 Base 3.89 Foil 80/20