What is this close-up picture? (WotsThat: Violin string texture (macro))

Question

What object is shown in this zoomed-in close-up photo?

BogIron · Accepted Answer

Violin string texture (macro). Violin strings were traditionally made from sheep gut rather than cat gut despite the old nickname catgut, and most modern strings now use synthetic materials or steel wound with metal for a brighter tone.

Answer: Violin string texture (macro)

More man made close-ups