♠ 24-hour shipping ♠ Free shipping ♠ Immediate purchase welcome, no need to comment ♠ Bundle discounts available! Feel free to ask. This 8.3-inch screw-in center fin is a replacement fin designed to improve the stability and straight-line performance of longboards and funboards. Suitable for a wide range of surfers, from beginners to advanced. It optimizes water resistance, supporting extended turns and stable riding. 【Product Specifications and Features】 Size: 8.3 inches (approx. 21cm) Material: Multiple nylon materials + fiberglass + carbon composite material (hybrid structure) Weight: Approx. 152g Compatible Boards: Ideal for single-fin and 2+1 (two-plus-one) setup longboards and funboards. 【Recommended Points】 Improved Straight-Line Stability: The larger size firmly catches the water resistance, enhancing stability, especially during take-offs and straight-line riding. Easy Installation: Quick setup, requiring no tools; simply insert into the box and secure with a screw. Versatility: Compatible with standard fin boxes, contributing to the performance improvement of your board. This is the perfect fin for those "who feel something is lacking in their current board's performance" or those looking for "a spare for damage or replacement." ----------------------------------- If you're hesitant to buy or have any questions, please feel free to comment! We strive for pleasant and courteous communication with each other. ! Note ! In all cases, we will prioritize those who purchase immediately. ★ Regarding Returns and Exchanges ★ Due to lighting conditions, the color may appear slightly different from the actual product. If you are concerned, please check in the comments. Please take a moment to read the profile. If you would like to see additional photos, please don't hesitate to ask! To ensure a smooth transaction, please inquire if you have any concerns! If you proceed with the transaction, we may not be able to accommodate your requests, so it's best to use the comment section before payment!