The cylinders were advertised as used and needing to be re-sleeved, but once received, the cylinders were in much better condition than I had expected.
The cylinders still needed to be re-sleeved, but the over all condition was clean and in very good shape, which saved me a lot of time by not having to clean and de-grease parts and not having to go out to try and find replacement studs.
The shipping was fast, and what was provided was a high quality core, which will result in a high quality finished and usable part.