I used all of these items once with a hamster, but they didn't suit my hamster, so I'm selling them. After use, I cleaned and stored them carefully, but please refrain from purchasing if you are concerned. The cardboard box for the cage has been chewed by the hamster, but the cage itself has hardly been chewed. There is a small amount of rust on one part of the wire mesh of the cage, possibly from being chewed. Please see photo 7. The set includes: Cool ceramic house Hamster nest Reversible heater (with instructions) I can also include used hamster supplies if you wish (at no extra cost).