[Premium Material] Made from high-quality PVC material for durable long-term use. Center fin and kayak skeg tracking fin mounting points for inflatable stand-up paddle boards, surfboards, and paddleboards. [Balanced Stability] Attached to both sides of the board surface to assist with central water flow alignment. Typically mounted on the bow section of the board’s bottom to help protect the hull from damage when encountering reefs or other impacts. [Multifunction] Kayak skeg tracking fin improves stability and directional control. High strength, lightweight, with high impact and heat resistance. Suitable for various inflatable surfboards including shortboards, longboards, and stand-up paddleboards. Can also be installed on kayaks to reduce water resistance. [Easy to Install] Apply adhesive to the installation area and the base of the fin, align properly, and press into position. Use a hair dryer to heat the area for a set period. After removing excess adhesive with a card, let the fins set for 24 hours before use. [Widely Applicable] Compatible with various inflatable surfboards and paddleboards. This tracking fin fits most kayak models. Weight: 100g/piece Color: Black Material: PVC Size: 21 x 6.5 x 6.4 cm Package Contents: 2 x Water Dividers Note: Light and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.