This is a shielded wire often used for Gibson-style guitars and basses. It's a stranded wire, AWG22 gauge. I think practicing soldering on guitars and basses is easiest starting with replacing the wiring. You could also start with replacing the pots or jacks. From my personal experience, replacing the wiring in Japanese or Asian-made guitars and basses often brings them much closer to the characteristics of American-made instruments, so I recommend giving it a try. Guitar Parts