https://www.showmecables.com/8...WEAQYAyABEgJRhPD_BwE
That product is called telephone cord. It does not have wire in it. It is composed of, in this case, four separate runs of copper tinsel, wrapped in a helix around a non-conducting center fiber. It has a very high resistance per linear unit. It is not designed for any use other than telephone cords. There is no industry-standard (read: reliable) method of terminating it other than to put 4p4c plugs on it and plug those into jacks.
I suspect that is no multi-conductor 26-gauge jacketed wire available these days, except for within specialized miniature electronic devices. Western Electric "D station wire" (22-4 w/jacket) was made in that size for decades, until in the late 1980's the bean counters at AT&T decided to issue 24-gauge. It failed in the field, almost as quickly as it was installed. Wrapping it around a terminal screw was as delicate as neurosurgery. The workers revolted. It was nick-named "angel hair." Mother recalled it, to be melted down and repurposed, went back to 22 gauge, and said she was sorry.
