With the purchase of your medallion* you receive a set of 3 soft foam fill rings (1, 2 and 3 mm). In total your medallion can house 4 insignia’s, dependant on the thickness of the insignias. These fill rings are fabricated of clear PMMA plastic and are hard. Because they are clear they take up the colour of your medallion and/or insignia. They are nearly invisible. Because they are hard it’s harder to find the right fit than with the foam fill rings. But because of the clear colour they are less visible than the foam fill rings. If you put more insignias in the medallion, dependant of the kind of insignia, it might be better looking of you place the fill ring in between the insignias. Attention: all fill rings are meant to fill up the medallion. Pay attention that you don’t overfill the medallion. This will put pressure on the lock. *exclusively the Grande (33mm) and Mezza (24mm) medallion.