@IaM-Ray. What I meant to say in my Spanglish ;-) is that one could use the spacer above/ pictured, by inserting between a 6 bolt nardi or momo hub, and a 6 bolt ( either nardi or momo) to 9 bolt wheel adaptor. If one had a nardi hub and a momo to nine bolt adapter already purchased,
For reference only: Bob could have used the momo to 9 bolt adaptor he already had, and connected it to the Nardi hub already in the car by introducing this small spacer between the two... which allows you to connect a nardi hub to a momo bolt adapter pattern.
... not relevant now since he decided to purchase a new nardi compatible adaptor, but for any future reference.
happy driving!!!