They dont look or feel isolated, like ones inside a headphone cable
They’re called enameled cables, they’ve got a thin layer of insulation which prevents them from rusting or shorting.
To add, enameled wires are also used in motor windings and old CRT monitors (deflector windings). The easiest way to identify it is to scratch with a knife or burn a small portion of the wire to see if the enamel separates.
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