Futures SB1 Fiberglass Sidebite Longboard Fins The SB1 sidebite will add stability to your longboard, improving hold along the face of the wave. Available as a pair, these fins are made of durable, yet flexible, fiberglass and are built with 4º of cant. Template Category | Neutral (balanced, all-around) Construction | Fiberglass Size | Small Longboard Side Fins Area 10.77 Height 3.57 Base 3.91 Foil FLAT