Features: Upgraded your surfboard with this fins Box Converter Adapters, for fins plugs compatibility while including fins key screws for installation and secure adjustments. Consist of durability impact resistant plastic, this light weight converter maintains structural integrity during intense water activity while remaining compacts for travel friendly storage. Ideal for longboards surfers and waved enthusiasts pursues customizable fins setups without permanent modifications to their board. Perfect for adapting fins between different surfs conditions. The completes package includes 3 converter, 6 screws, and a fins key essential tool for quick fins that optimizes performances across varying waved types. Specifications: Dimension:1.711.3cm/4.450.67in Component:PVC Package Includes: 1Set fins Box Converter adapters note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.