Liquid Force HARLEY 131 Wakeboard Aggressive Three-Stage Rocker - Straight up boosts off the wake. Triple Concave into Quad V Channels - Triple Concave is provided for pillow-soft landings with conti Low volume, variable-edge rails - Faster on edge with more hold... smooth and catch-free through the Carbon-X Configuration (+-45) - Designed within Harley's specifications, this X increases torsional Liquid Force Small RX Quad Fin Setup - Short, low-profile blades for low drag and superior control.