BPS Stealth Performance Core and Netted Fibreglass Surfboard Fins Thruster FCS Style (3 Fins) Choose Color and Size BPS have wrapped a seriously light performance Hexcore in a netted fiberglass skin to produce a light fin with amazing rigidity and better flexibility than regular plastic fins Fits to any surfboard, shortboard, funboard or longboard that uses FCS style fins. Available in medium size (similar to FCS M5's) and large size (similar to FCS M7's in size) Tested and thrashed by BPS to make sure theyve got what it takes and are built to last Fully guaranteed for one year so if it doesn't deliver what it is supposed to, it will be replaced or you'll be refunded - your choice Thank you for looking at a product from our store - Surf and Snow Warehouse. We are a small family business that ONLY sells what we know and love - water sports gear. We know our products, use our products, and stand behind them 100% (please do check our feedback) - So if you have any questions about using any of our products please just ask. Thank you