This is the GoPro Large Tube Mount (Roll Bars + Pipes + More) Features: The hinged, non-slip design connects quickly to any 1.4 to 2.5in (3.5 to 6.35cm) diameter tube Integrated base features 360Adeg rotation with 16 secure positions, ensuring the perfect camera angle Move your camera between mounts on the fly with the included Vertical Mounting Buckle to enable multiple POVs for more dynamic footage Durable construction prevents slipping and breaking and minimizes vibration and camera shake No loose parts to drop or lose Attach your GoPro to roll bars, railings or any tubes from 1.4 to 2.5in (3.5 to 6.35cm) in diameter. The hinged, non-slip design is perfect for mounting to roof racks and more. The integrated base rotates 360Adeg to let you capture shots from any angle at the push of a button. Move your camera between mounts on the fly with the included Vertical Mounting Buckle to enable multiple POVs for more dynamic footage. "