Features: Our 17mm double-side ball mounting arm enhances the stability of the device, with double ball head that can bend and adjust, flexible rotation, and safe positioning, making it perfect for any mobile setting. This 17mm extension rod connection is crafted from plastic and metal, suitable for daily use while providing reliable fixation for your phone, map, or tablet. Very suitable for individuals and professionals who require multifunctional installation solution for devices, ensuring convenience and accessibility in various environment. Whether you navigating on the roads, setting up live broadcasts, or taking photos, this universal ball head accessory can seamlessly integrate with car phone stands, tripods, and desktop stands. With its user-friendly design, this mounting arm allows you to easily DIY phone stands or navigation systems, making it a practical accessory for enhancing your digital experience. Specifications: Material: Plastic Length: 125mm/4.92'', 200mm/7.87'' Round tube diameter: 11mm Ball head diameter: 17mm Package Includes: 1Piece 17mm Double Ball Extender note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.