Description of ball mounting
17mm Ball Mount arm is made out of aluminium alloy material and is compatible with all industry standard 17mm mounting arms. Ball joints are coated in a rubber material.Commonly used as a converter and other industry standard 17mm dual ball mounts / arms to any industry standard 17mm bracket including Garmin GPS and Others 17mm Ball smartphone holders.With the dual ball adjustments, this mount allows you to have the flexibility of rotating your device 360 degrees. 17mm mounting pattern for Garmin GPS, Others Phone holders, or any other 17mm mounting pattern device.