Put one on each model in a unit and another on the unit card in Star Wars Legion when you have identical squads. Paint them different colours to allow units to be identified.
Obviously not required if you can identify the markings with use of a real stormtrooper helmet.
Set Consists of:
21 Empire Icon Discs 5mm x 3mm
Designed by Gareth Watson
Made of Polyurethane Resin