The key criterion is whether the support is designed for winding textile yarn. Bobbins and spools purpose-built for thread or yarn winding — typically with flanged ends or specific core dimensions matching textile machinery — fall under 482210. General-purpose winding cores for wire, film, or other non-textile materials go under 482290.

Classification depends on the essential character of the article. If the paper or paperboard component gives the bobbin its essential character and the reinforcing element is minor, it may still fall under 4822. However, a composite article where metal or plastic predominates could shift to a different chapter. A binding ruling is advisable for composite constructions.