AQUBONA Twin Keel Fins, Single Tab Dual Tabs Fins Surfboard Fins,

Material: Made of lightweight, high-strength Fiberglass Reinforced Polymer material. Includes: twin keel fin, premium fin bag and fin key. Size: Base: 6.37" Height: 4.60" High performance: Slice smooth sweeping arcs in the waves, with the stiff flex and balanced template of these twin keel fins (similar template to Futures K2 Keel fins). Designed for twin-fin fish surfboards, both modern and retro boards. If you're anything like us then you love the speed you get from flying down the line on a fish. We made sure to give this fin plenty of base and area to get you moving faster than most!