Blacksmith Olympic Boat Carbon Fiber Wind Vane Bring your sailing experience to a new level Davis Instruments introduces Blacksmith Wind Vanes, made from super lightweight 3D carbon fiber and duraluminum to withstand the rigors of hard racing. Feature precise balance Olympic Boat Carbon Fiber Wind Vane is effective and efficient in 0.8 knot up to 40 knots wind conditions. Features: Handmade carbon masthead wind vane for boats up to 20 ft 9 9 in / 23 23 cm 0.5 oz / 13.9 g 3D carbon & duraluminum J-base for side, top, or front mounting