Material: This surfboard SUP fin is made of nylon plastic with a smooth and refined surface treatment, providing stable attachment to the surfboard. The material offers excellent wear resistance, impact resistance, and hydrodynamic performance. Unique design: Streamlined shape enhances surfboard stability and balance, improves turning performance, and helps reduce impact from underwater obstacles, increasing safety. Ideal for surfers who enjoy maneuvering. Easy to use: Features an insert snap-in safety reinforcement buckle. Securely glue the fin base to the rear of the surfboard for quick installation and removal of the SUP fin as needed. Improved paddling experience: Designed to enhance stability and balance on the water, reducing the risk of damage from contact with reefs or rocks during paddling. Especially suitable for beginner surfboards to assist in maintaining control. Application: Includes 1 SUP fin. Compatible with various inflatable surfboards, including longboards, stand-up paddle boards, and other standard surfboard types.