You are looking at a lot of 6 pieces of Lionel track 6-65572. This is the full O gauge tubular track (NOT the smaller, thinner 027 gauge or the roadbed-based FastTrack). It is the traditional three rail 0 gauge tubular track with the black ties.
Since Lionel stopped make it some years ago, it is only going to get harder to find.
Each section is approximately 14 inches long. These six make 3/8 of a circle, just under a half. Great to have extras, or if you are filling out a circle or have a unique curve.
This is great for those larger engines and passenger cars.
CONDITION: C-6. Looks nice, but has been used and shows a little wear. All pins are here, and the track is complete. Tops of rails are clean; sides show some oxidation.