"Parameters" Product Name: Surfboard Accessories, Plug-in Fin Splitter, Base Removable Cail Fin Product brand: none Material: environment-friendly PVC Weight: 100 g Color: black Size: 18.5 * 3.3 * 22 CM "Copy" 1, high quality soft PVC material, toughness. 2, Easy installation, teaching process, suitable for all kinds of inflatable SUP surfboard, increase the stability of the surfboard.Improve the steering ability of the surfboard. 3. The water divider of the seat surfboard is glued to the back end of the reverse side of the surfboard with glue 4. The size of the water distributor is 18.5cm *22CM* 3.3cm. 5, can increase the stability and direction of the surfboard, let you enjoy the fun of surfing!The thrill of extreme sports. 【 note 】 It is generally adhered to both sides of the board surface to assist the use of central large water divider Easy to install: With the user friendly design and quick-release detachable system, the replacement fin for paddle board can be slid in and secures easily. NO hassle of screws or tools any more! Nylon construction gives this sup fin stiffness yet enough flexibility. You don't have to worry about 'came off and 'breaking' so that you can enjoy surfing moments. This ISUP fin can improve the tracking of your paddle board, making it easier for you to go in a straight line. Easy to install: With the user friendly design and quick-release detachable system, the replacement fin for paddle board can be slid in and secures easily. NO hassle of screws or tools any more!|Nylon construction gives this sup fin stiffness yet enough flexibility. You don't have to worry about 'came off and ‘breaking’ so that you can enjoy surfing moments.|This ISUP fin can improve the tracking of your paddle board, making it easier for you to go in a straight line.