["Descirption:\nbrand new and high quality\nFeatures:\nBall for Head Diameter: 18mm, suitable for tablet/mobile phone holders that can be connected to 17mm/18mm bracket ball heads.\nBase Screw Hole Size: standard 1/4 or 6mm screw mount.\nInstallation Position: can be installed above the screw for head of the tripod/selfie stick/camera holder.\nApplications: connect the mobile phone/tablet to the tripod bracket so that the direction can be adjusted 360 degrees.\nEasy to Use:Fix the adapter to any mount that fits the 17mm ball for head, and then use 1/4”-20 mounting bolts to tighten the camera.\n\nSpecification: \nMaterial: Nylon\nLength: Approx. 40 mm/1.57 inch\nBall Diameter: Approx. 18 mm/0.71 inch\nBase Diameter: Approx. 21 mm/0.83 inch\nBase Screw Mount: Standard 1/4\"\n\nNotes:\nBallhead adapter only, other demo accessories are not included.\nPlease allow 0-1cm error due to manual measurement. pls make sure you do not mind before you order.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage Includes: \n1 Piece Ballhead Adapter"]