Features 1、STRONG CONNECTION: The well designed structure ensures a strong connection between the windsurfing board and the surfboard, which enables the windsurfing board to realize accurate steering and stable handling at high speeds and in complicated waters. 2、IMPROVE STABILITY: The depth and width are accurately calculated to improve the stability of the windsurfing board on the water, even in windy and rough conditions, allowing surfers to challenge their limits with more confidence. 3、WIDE ADAPTATION: Suitable for many sizes of poles and surfboards. Both beginners and professionals can find the right groove to match their equipment and enhance the overall performance. 4、PREMIUM MATERIAL: Made of high strength, not easy to corrode PVC material to ensure that it is not easy to wear or damage under long term use, prolonging the service life. 5、QUICK INSTALLATION AND ADJUSTMENT: Users can quickly and easily install or adjust the position of the windsurfing slots to meet the needs of different wind and water conditions. Item Type: Surfboard Fin Box Material: PVC Package List 1 x Surfboard Fin Box