Question about Belkin Magnetic Wireless Car Charger

I would also like to mount the mount on another base that has a ball (OtterBox Car Dash & Windshield Mount for MagSafe).

Could someone measure the diameter of the ball? (with a caliper). I'm sure that would be very helpful for others as well.

The ball of my Otterbox mount has a diameter of 17mm.

I have also replaced the bracket. The dimensions of the ball seem to be quite common across manufacturers.

There is a thread on the back into which the ball from the fan holder is inserted and fixed. I would like to send a photo