17mm Ball for Head Converter 1/4 Screw for Head for Car Monitor Pad Cellphone Ball Mount Base for Camera Brac 17mm ball mount adapter base phone holderFeatures:brand new and 360 degree rotation ball for head, easy to adjust the angle.Easy to operate and simple to install and assemble.It is suitable for motorcycles, scooters, motorcar, pull car and other vehicles.It is suitable for phone holder, camera holder, recorder holder and other use high-quality aluminum alloy materials, firm and shock-proof to use.Specifications:Aluminum AlloyColor: BlackDia:Approx. 17mm/0.67 inchesPackage Includes:1x Ball for Head AdapterNote:1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.