FCS Knubster Keel Fin

The FCS Knubster Center Keel can be added to any quad or tri fin setup. It gives you a little bit and a low profile fin option. Many paddlers and surfers will use these as side bites or as a center fin on shorter boards that have FCS boxes. Sold as single fins with single tabs. FCS Knubster Center Keel Specs: Base: 3.82 Depth: 1.71 Area: 4.40 Sweep: 32.0 Foil: Flat.