Durable Material: The Center Fin Is Made Of High Quality Abs Material With High Strength, Good Stability, Uv Protection And Aging Resistance, Corrosion Protection, Not Easy To Break, Strong And Durable. So You Can Surf Safely Fixed Base: The Dock And The Fin Of The Surfboard Can Be Removed, And The Base With A Fixed Pin Can Fix The Water Divider More Firmly On The Surfboard. Fixing Pin With Rope Is Not Easy To Lose Streamlined Appearance: The Shape Of The Sup Replacement Fin Looks Like A Fish Fin, Which Can Dissipate The Resistance Of Water Flow And Maintain The Balance Of The Surfboard. With The Help Of The Water Divider, You Can Better Control The Surfboard And Run Quickly And Stably Easy Disassembly: Insert The Sliding Fin, Fin Dock Then Insert The Mounting Pin To Complete The Installation. 'Facility. Thanks To The Quick Installation, You Can Easily Practice Water Sports. Due To The Simple Dismantling, The Surfboards Are Also Easier To Transport Area Of ​​Application: The Long Center Fins Of The Board Improve The Surfing Experience While Surfing And Protect Your Board From Reef Bumps. Suitable For Most Types Of Sups Like Surfboards And Competition Boards