Lots of habitrail for gerbils, mice or hamsters. Put them together in infinite combinations. Three large habitats, four various small pods, 8 long tubes, 3 water bottle tubes, 7 t-junction tubes, 7 curved connectors, 5 5-way junctions, 2 arcs, a dozen end caps. All pieces come with one connection ring. Blue habitat had a crack in the lid, but still works great. Two small pods are slightly stained. Two wheels, one attached to habitat and one free standing. Several flexible wooden bridges. Running around ball. Feeding dish and a few miscellaneous items. Everything clean and sanitized. More photos available on request.