What bolts are used for the Urban Arrow 'Maxi Cosi' Baby Seat Adapter?

 

The bolts that are used for the 'Maxi Cosi' Baby Seat Adapter are M5 and M6 inbus RVS A2, 20mm bolts.

More information about the 'Maxi Cosi' Baby Seat Adapter, can be found in the Baby Seat Adapter installation and user instruction