FCS II Accelerator PC Thruster Fins - Red These fins are designed to deliver a perefct balance of speed and flow with response added control. They included an oversized, all-round template with a fuller tip. For surfers that attack the lip with performance aggresive turns these fins are ideal. They prefer a fuller and more sizable wave however still hold up when conditions drop off slightly. Surfers aiming to take their surfing to a new and performance driven level, these provide a stepping stone for heading in the right direction for improving ones surfing on all accounts.