If it's not rotten, then of course you can use it as a wrap on a cue. Heck, you could use dental floss if you really wanted to... Now, whether it's the stuff preferred by most when they talk about a Cortland wrap, that's another story. You probably searched and found that the popular stuff is typically white with green, and is the Cortland #9, which is 9 strands of 3 lbs line, making it 27 lb test, and approx .025" diameter. What exactly you have there, we can't tell from the pics provided.