1.High quality: Our surfboard sup fin is made of highquality plastic, good abrasion and shock resistance and refraction to water. This fin for sup has a smooth surface and sticks well to the board. Our sup fin provides more stability and balance on the board and effectively reduces the impact of the reef when paddling 2. upgrades: Our sup fin has been completely improved, less elasticity, more rigidity and less breakage and less deformation, this makes it easier for you to speed up your surfboard while surfing and gives you an excellent surfing experience to catch the waves and enjoy the ride on the sea 3.Sleek appearance: our replacement fin sup is a paddlein shape with a fin at the top and a streamlined appearance that corresponds to the physics of water sports and effectively improves the agility of the board and increases its turning dom so you can surf r 4.Easy to use: Our Sup fin has a locking reinforcement buckle, you simply attach the Sup fin to the base of the rear end of the surfboard. If this sup fin is not needed for your board, you can remove the clip on the fin, so you can easily attach and remove it without additional tools