Twin Keel Surfboard Fins Set of 2 Black Nylon Fiberglass Double Tab FCS FCS II Compatible for Twin Fish Shortboards (for FCS II)

• WIDE COMPATIBILITY： This twin keel fin set fits double tab surfboards with FCS and FCS II fin boxes, matching modern and retro twin-fin fish shortboards to meet daily surfing demands
• DURABLE LIGHTWEIGHT MATERIAL： Constructed with nylon and fiberglass reinforced polymer, the fins own light weight and solid structural strength, resisting deformation during long time sea use
• STABLE SURFING PERFORMANCE： Flat foil design supports smooth sweeping arcs while surfing, delivering reliable stability and precise control even at high speeds on water surface
• CLEAR STANDARD SPECIFICATIONS： Fin base length 160mm equal to 6.3 inches, fin height 118mm equal to 4.65 inches, standard size for twin fin surfboard replacement and upgrade
• COMPLETE PACKAGE ACCESSORY： Package includes two black twin keel fins only, easy to install and replace old damaged fins without extra matching parts

Twin Keel Surfboard Fins Black 2 Pack This twin keel surf fin set is made for twin-fin fish shortboards, compatible with all double tab FCS and FCS II surfboard fin boxes, suitable for both new style and classic retro surfboards. The surf fins adopt nylon mixed fiberglass reinforced polymer material, combining lightweight texture and high structural hardness. The flat foil structure enables smooth gliding arcs on waves, bringing steady balance and accurate maneuver control when surfing at full speed. Lightweight and sturdy construction makes the fins suitable for daily offshore surfing, stable performance without loose swing during high-speed gliding, ideal replacement accessory for twin fin shortboard lovers. Product Technical Specs Color：Black Applicable Fin System：FCS FCS II Material：Nylon Fiberglass Reinforced Polymer Fin Base：160mm 6.3 inch Fin Height：118mm 4.65 inch Package Contents：2 x Surfboard Twin Keel Fins