Futures Fins Scimitar Quad Rears (Alpha)The Scimitar quad rear fins are designed to pair with the Alpha Vector 3 2 front fins, to be ridden as a quad set. They feature the flattened Scimitar tip on the trailing edge to keep the turning arc tight and a flat inside foil that enhances lift and release when ridden as a quad. Construction Alpha Size Medium Large Sold as a pair (left + right fins) to fit Future's shallow depth fin boxes SPECIFICATIONS Rear Fin Area 11. 25 Height 4. 01 Base 3. 94