【New】CENTER SMALL KEEL FIN Red Keel Fin Retail Price: ¥5,900 Color: Red Product Size: Base 10cm, Height 4.6cm ◆ Fin Description MATERIAL: Glass Flex This center fin can be added to TWIN, KEEL, and quad setups. This fin increases drive and controls direction through turns without sacrificing speed, flow, and the free movement often found in quads. If your board has a center fin box, it can be attached to all board types, such as longboards, funboards, shortboards, Simmons, and other alternative boards.