Designed by Al Merrick for the Fish Board model. Performance Material Size Shipping Overview Designed by Al Merrick for the Fish Board model. With a focus on speed and flow, this is a true performance keel. A modern template combined with a progressive flex provides excellent control for power surfing. Board Types Designed to fit the FCS II Fin System. Recommended for all board types including fish, funboard and twin fin boards. Performance Glass Performance Glass (PG) fins are machine cut from layers of solid fiberglass. These fins are stiff, and are widely used by pro level surfers because the integrity of the flex is maintained under immense force, and in the most extreme of conditions and situations. X-SMALL (Under 55Kg / 120 Lbs)SMALL (55Kg - 70Kg / 120 - 155 Lbs)MEDIUM (65Kg - 80Kg / 145 - 175 Lbs)LARGE (75Kg - 90Kg / 165 - 200 Lbs)X-LARGE (Over 85Kg / 190 Lbs) View the FCS Fin Data page for Base/Depth/Area/Foil information. We offer: Tracking: Quick & easy online tracking. Peace of Mind: All our deliveries are fully insured against damage. Returns: 30 days exchange or refund for unopened items.