Features: This Handlebar Clamp Mount Base features a strong 17mm ball, designs to secure hold your phone mount holder on rails ranging from 20mm to 30mm in diameter, ensuring stability and reliability during your ride . Crafted from plastic, this handlebar clamp mount base is engineered for strength and long, providing a solid base for various phone mounts, including magnetic and tablet holders. Ideal for cyclists, motorcyclists, and outdoor enthusiasts, this versatile mounting solution caters to anyone needing a reliable way to secure their devices while on the go. Perfect for navigation, live streaming, or photography, this mount base adapts seamlessly to different environment , whether on a hard mountain trail or cruising through city street . With its universal compatibilities and easy installation, this handlebar mount base is essential accessory for enhancing your biking experience, offering both convenience and peace . Specifications: Material: plastic Length: about 9cm/3.54inch Package Includes: 1xHandlebar Clamp Mount Base note: Please allow 1 to 3cm error due to manual measurement, please make sure you not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.