The phot r 25 roll cage mount for gopro hero allows you to attach your gopro to roll bars tubes and more fits 14 to 25 35cm to 635cm diameter tubes this opens up filming on your ski pole mop handle trombone or walking stick made from a lightweight aluminium means it will stand up to the most brutal of conditions clamps to any 14 to 25 35cm to 635cm diameter tubes mounts to roll bars bike frames roof racks and more perfect for clamping to the metal or plastic radia