Premium Material This surfboard fin and fin base are made of nylon plastic, offering toughness and durability. It provides excellent wear resistance, impact resistance, and hydrodynamic performance. The detachable design ensures secure fitting with no looseness between connecting parts. Unique Design Streamlined shape enhances surfboard stability and balance, improves turning performance, and helps reduce impact from underwater obstacles, increasing safety. Ideal for surfers who enjoy dynamic turns. Practical and Easy to Install The base is detachable. The center fin attaches to the base via a slide rail and is secured with a connecting rope. The rope design prevents loss, ensures portability, and allows for quick, tool-free installation and removal. Wide Application This center fin is suitable for surfboards, kayaks, canoes, and pedal boats. To install, attach the fin base to the rear of the board, then insert the fin into the base. For permanent mounting, the base can be glued to the bottom of a paddle board.