FCS II Modern Keel Twin Fin Set (Used) Add speed, flow, and classic twin-fin performance to your surfboard with this used FCS II Modern Keel Twin Fin Set. Designed for fish surfboards, retro-inspired shapes, and modern twin-fin designs, the Modern Keel template delivers exceptional down-the-line speed, smooth rail-to-rail transitions, and effortless glide across a wide range of wave conditions. Featuring a traditional keel-inspired outline with a modern performance twist, these fins provide plenty of drive and hold while maintaining the loose, fast feel that twin-fin surfers love. The larger surface area helps generate speed naturally, making them ideal for smaller waves, point breaks, and playful surf where maintaining momentum is key. Compatible with the FCS II tool-free fin system, installation is quick and secure without the need for screws or tools. Whether you're looking to replace a lost fin set or upgrade your favorite fish, the Modern Keel Twin offers a proven blend of speed, control, and style. This fin set is in used condition with normal cosmetic wear from regular use but remains fully functional and ready for the water. Features Genuine FCS II Modern Keel Twin Fin Set Keel-inspired template for maximum speed and flow Excellent drive and hold with smooth turning performance Ideal for fish surfboards and twin-fin setups Great for small to medium-sized waves Compatible with FCS II fin boxes Tool-free installation and removal Used condition with normal signs of wear Fully functional and surf-ready
