Spread the melted gianduja onto 2 acetate strips .5 cm / .25 in by 12.5cm / 5 in.
Let it set halfway, then wrap the strips around a 5-cm / 2-in diameter PVC tube. Let them set on the tube.
Once set, take the acetate off.
Reserve at room temperature in an airtight container. If these garnishes are left in a cool, dry environment, they will last for over 1 year, but that doesn’t necessarily mean they should be made a year ahead or made in a quantity that will last you a year.