This is a set of 4 Exo Terra Nano terrariums. The photos show 2 cases, but this is a set of 4. I used them to observe the animals with a layout. They were used indoors for about 6 months. There is no background board. There seems to be some hot glue residue, so I will upload photos later. I will clean them as much as possible, but please understand that any remaining dirt or stains will be as is, and purchase accordingly. I did not keep reptiles in them, so there may be more layout removal residue than scratches.