Perfect for surfers and advanced SUP: Surf dump shore rest, shallow reef. On your SUP: Challenge flying fish in white water, low-water streams, rivers, and shallow lakes. This fin is flexible and will not break in most cases and is less likely to break your board's fin box. Suitable for longboards, SUP and Inflatable SUP (Inflatable pad with air7 fin box or US box - contact us for confirmation if unsure) Suitable for most longboards/(stand paddle) SUP/airSUP. Most longboards and stand paddleboards use the universal fins system, you can use this to replace the fins. For beginners and children: Surfing for the first time can be dangerous, usually the fins are the sharpest part of your board, with this you will feel safer - the fins will bend and bend more, making it harder to hurt yourself and others. Streamlined design: The surfboard fin shape is unique, the upper end of the fin, streamlined appearance in line with the physical principles of water sports, effectively improve the flexibility of the surfboard, improve the steering performance, very suitable for beginners and professionals. Professional fins for surfboarders: Surfboard fins are designed to increase the stability and balance of the board, effectively reducing the impact of coral reefs when paddling. It's really good for steady paddling for beginners. Easy installation: No professional tools required, with a quick-release detachable system that ensures quick assembly or removal of surfboard fins. Specifications: Product Name: Surfboard tail fin Material: PVC Size: 19x11.7cm Package Included:1x Surfboard tail fin Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you 2. Please allow 0.1-2cm measuring deviation due to manual measurement.