Thank you for viewing. This is a set of 16 KATO HO R550 curved rails. This is enough for one complete loop. These are the older type with separate roadbed and sleepers. However, the joiners have been replaced with the latest ones, not the old copper-colored ones, so the electrical conductivity is good. Some of the rails were previously used in a layout and have screw holes in the roadbed or adhesive residue on the bottom, so please be aware of this. The roadbeds are not damaged or significantly discolored. There is no box, so they will be bundled and wrapped for packaging. R550 curves allow for continuous running in a small space, but please note that some metal precision models may not be able to pass through them.