Features: Dynamics Design: The side fins have an angle of 5 degree, conforming to fluid dynamic, can keep the surfboard stable in the water without rollover. Easy to Replacement: Each of fins has bolts fixed to the surfboard, you can fasts instation and disassemble. Replacements for foam surfboard. Portability and Functionality: Soft and light, easy to carry. This fins fits set great for technology-surfers who like to push hard-against their fins and draw out their turns. Advantages: Provide stability for surfboard fins; maintain balance; In the event of reefs or other impact, the tail fins protects the surfboard to the greatest extent from damage. Perfect Service: Your satisfaction is our top priorities. If you are not satisfied with our product or have any questions, please feels-free to contact-us. Specifications: Material: Nylon+Fiberglass Color: Black/White/Red/Yellow/Green/Blue Package Weight: approx.200g Size: approx.11.4x11cm/4.48x4.33in (More Size Detail, Please See Photo.) Package Includes: 3Pcs Kiteboarding Fins note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!