Feature: 1. It is made of strong and durable nylon and plastic materials of high quality. 2. It has a base for fixing/dividing water plate converter. 3. Sliding and locking splitter converter, detachable, can be applied to the American SUP water separator plate. 4. It can easily paddle with great energy saving, easy transportation and shock resistance, providing you with an excellent surfing experience. 5. Easy installation, doesn't take a lot of tools and a lot of effort. Sea game good accessories, you are worth having one. Specification: Item Type: Fin Box Adapter Material: Nylon + Plastic Color: As Pictures Shown Product Size: Approx. 21x5.2x4.5cm/8.3x2x1.8in (Manual measurement with an allowable error of 1-2 cm) Screw Hole:4mm/0.2in (Manual measurement with an allowable error of 1-2mm) Weight: Approx. 157g/5.5oz Suitable for: Adults Quantity: 1 pc Product Category: Surfboard AccessoriesAssembly: It Can Be Used on American SUP Water Separator Plate.Design: in Practical Use Can Easily Paddle, Very Labor-saving . Package List: 1 x Fin Box Adapter 1 x Screw Nut Note: 1. Manual measurement, please allow a little error, thank you!2. The picture may not reflect the actual color of the project due to the differences between different displays.