Futures AM1 Alpha Thruster Surfboard Fins - Medium The AM1 Alpha, designed by legendary shaper Al Merrick of Channel Islands Surfboards, is a medium-size thruster in the Rake template category. Featuring a balanced flex pattern, this fin’s wider base provides increased drive through turns, making it ideal for high-performance surfing. The centre fin is smaller than the side fins for increased manoeuvrability. Template Category | Rake (drawn-out, control, drive) Construction | Alpha Ride Number | Balanced – 5.8 Size | Medium (145 – 195 lbs) Side FinsCenter Fin Area 14.84 13.35 Height 4.50 4.29 Base 4.50 4.31 Foil FLAT SYMM