brand new and high quality Descirption: Features: Double ball adapter extension joint connecting bracket for 17mm magnetic car phone holder. Round magnet for head is more stable to fix the phone, double ball for head rotation adjustment angle. Made of engineering rubber, good toughness, not easy to break. Can be installed on car recorder bracket/car phone holder, etc. Suitable for mobile phone holder, tablet stand, recorder, GPS navigator, etc. Specification: Material: Rubber+Metal Ball Head: Approx. 17mm/0.67" Name: Mobile Phone Car Holder suitable for 17mm Connector Ball Diameter: 16.6mm Top Joint Specifications: Two Ball Joints of the Same Size Interface: 16.6mm Ball for Head Notes: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1x Ballhead Extensiont Joint