Description: Compatible with cameras having the 1/4" mounting pattern Fits onto mounts accommodating the 25mm ball pattern This package includes only the 25mm Swivel Ball to 1/4" Camera Mounting Bolt Adapter. Secure the adapter onto any mount accommodating the 25mm ball pattern, then screw the camera on using the 1/4" mounting bolt U-Bolt Base For Motorcycle Bike Handlebar Mount; This u-bolt base contains a 1" rubber ball Specification: Mounting Type: Handlebar Material: Powder Coated Marine Grade Aluminium Ball Size: 1" (25mm)Rubber Ball U-Bolt: Zinc coated steel (not rust proof) Package Includes: 1 Piece Motorcycle handlebar Mount