You're looking at a type of cable that's older than your grandma. Coaxial Braid 1000 is a type of cable that was used in the 90s and early 2000s for connecting your old computer to the internet. Yeah, it was a real thrill-ride.
Coax Braid 500: The one that came before Coax Braid 1000 Coaxial Braid 2000: The one that tried to make a comebackYou can find some of these relics at your local antique shop. If you can find one, it's probably worth at least $10.