RAM-B-367U 1 inch rubber mounting ball with M8 allen bolts.
This easy to mount 1" ball provides a soft vibration dampening base and no slip grip to carry your valuable electronics. Simply add one of the short, medium or long double socket arms and whatever cradle or mounting plate you need.
The B-376 Ball comes with 3 black anodized M8 bolts in 55, 60 and 65mm length (1.25 thread pitch)
Perfect fit on BMW motorcycles and many other bikes.