Perfect for surfers and advanced SUP enthusiasts: ideal for shore breaks, shallow reefs, and navigating white water, low-water streams, rivers, and shallow lakes. This fin is flexible and durable, designed to withstand impact and reduce the risk of damage to your board's fin box. Compatible with longboards, SUPs, and inflatable SUPs (with FCS7 fin box or US box— for compatibility confirmation if needed). Fits most longboards, stand-up paddleboards, and inflatable paddleboards that use the universal fin system, allowing easy replacement of existing fins. For beginners and children: Traditional surfboard fins can pose a safety risk as they are often the sharpest part of the board. This flexible fin bends on impact, reducing the likelihood of injury to yourself and others, making it a safer choice for new riders. Streamlined design: Features a unique fin shape with a tapered tip and hydrodynamic profile that aligns with water flow principles, enhancing board flexibility and improving steering control. Suitable for both beginners and experienced riders. Performance benefits: Designed to improve stability and balance on the water, helping to minimize impact when paddling over uneven surfaces such as coral or rocky areas. Offers reliable tracking and control, especially beneficial for learners during paddling exercises. Easy installation: No tools required. Equipped with a quick-release detachable system for fast and secure attachment or removal. Specifications: Product Name: Surfboard Tail Fin Material: PVC Size: 19 x 11.7 cm Package Included: 1 x Surfboard Tail Fin Notes: 1. Due to differences in monitor displays and lighting, the actual color may vary slightly from the images shown. 2. Please allow 0.1–2 cm variation due to manual measurement.