Equip your sailboard or kayak with the round sail base, featuring a screw lock mechanism for added security. base mat provides a stable platform for your wind sail equipment, ensuring smooth and efficient sailing. This universal joint base assembly is designed for easy installation and reliable performance, making it an essential accessory for any sailing enthusiast. Features -Color:Black -Material:PVC -Size:12.30X12.30X2.70cm/4.83X4.83X1.06in -Firm and stable: ensures the base is securely fixed, providing reliable support without the risk of loosening -Universal joint rotation: the rotation feature of the universal joint allows for angle adjustments to suit different conditions -Lightweight and easy setup: the base's lightweight design makes it easy to install, transport, and use in various environments -Multiscenario adaptability: ideal for outdoor activities such as camping, exploration, and boating, this base adapts to different environmental needs -Optimized sail performance: the base's stability features enhance sail stability and wind efficiency, boosting overall performance Package list: 1 x sail base