17mm ball to be used with your existing Garmin Nuvi cradle.
This replacement holding plate allows you to change your Herbert Richter mounting option to hold an alternative or different GPS SatNav system.
The Herbert Richter 4 lugg Adapter System allows you to replace just the holder part of your Herbert Richter mounting option if you change or up-grade your TomTom GPS SatNav system.
Simply remove the old holder and slot on the new one; It couldn't be easier.
No need to replace the whole mount. Suitable for both suction cup mounts and air vent mounts using the four lugg AdapterSystem.