Plate mount for mounting your license plate on the support Crossbar of your Adventure motorcycles luggage rack. The bar diameter is set to 18mm for custom rack made of givi parts, so you may be able to use this on any other crossbar with a 18mm+ diameter bar.

I didnt add any adhesive/tape as the friction of the PETG seemed enough.

Hardware Used:
4x M4x30mm Bolts threaded up from plate side of clamp.
4x M4 washer
4x M4 Nylock
2-4x M6 Bolts for license plate (I do not have any specific figures here, but you will probably need to replace the plastic plate hardware if you are using the common plastic hardware).