Perfect for surfers and advanced SUP riders: ideal for shore breaks, shallow reefs, and navigating white water, low-water streams, rivers, and shallow lakes. This flexible fin is durable and less likely to break under impact, helping protect your board's fin box. Compatible with longboards, SUPs, and inflatable SUPs (with FCS7 fin box or US box— for compatibility if uncertain). Fits most longboards and stand-up paddleboards that use a universal fin system, allowing easy replacement of existing fins. For beginners and children: Traditional surfboard fins can be sharp and pose a risk during falls. This fin is designed to bend on impact, reducing the risk of injury to yourself and others, making it a safer choice for new riders. Streamlined design: The fin features a unique hydrodynamic shape that enhances board flexibility and improves steering control. Its tapered tip and smooth profile support efficient water flow, benefiting both beginners and experienced riders. Performance benefits: Helps improve stability and balance on the water, especially during paddling. Reduces the risk of damage when riding over submerged obstacles like coral or rocks. Ideal for maintaining control in variable conditions. Easy installation: No tools required. Features a quick-release system for simple, secure attachment and removal. Specifications: Product Name: Surfboard Tail Fin Material: PVC Size: 19 x 11.7 cm Package Included: 1 x Surfboard Tail Fin Notes: - Due to differences in monitor displays and lighting, the actual color may vary slightly from the images. - Please allow 0.1–2 cm variation due to manual measurement.