I bought a TomTom Go 500. It was the active mount with suction cup. What can I say. The Navi is flying around in the car only. Fortunately even wars fixed always on the cable, which has the crashes decreased a little. Since I had previously ne of HR suction cup, it was clear that what needs to happen in this direction. Unfortunately, HR has no right holder for the TomTom GO 500. So measured ball head diameter and looked to see whether there might what is suitable for a different Navihersteller. And lo and behold ....., Becker fit. Now I have the active support of my TomTom's on the suction cup of H-Richter. And that holds bombproof. Maybe a note to the company ....: Thou must reveal calm that is compatible. Delivery was as usual from Amazon over quickly. The purchase via Amazon is easier than in any grocery store. Oh yes. The quality of the adapter / mount ..., Top quality, absolutely accurate fit.