Motorcycle Handle Bar Rail Mount 37mm Width U-Bolt Mounting Base with 1 Inch Ball for Gopro GPS Work for Ram Mounts Used on: Motorcycle / bicycle / scooter, etc._x000D_ Suitable for equipment: mobile phone bracket / camera bracket(users can use by their own DIY)_x000D_ The diameter of the ball is 1 inch_x000D_ Fully compatible with hammer mount_x000D_ U-bolt can install round rod 11 -37mm size:98x60x25mm_x000D_ Material:Plastic + aluminum alloy_x000D_ colour:black Package Contents:_x000D_ 1 * connecting ball bracket + U-bolt assembly Only the above package content, other products are not included._x000D_ Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_