Ware Manufacturing Ware Critter Universe The Great Wall Critter Habitat Expansion 3 Wall critter universe It comes fully assembled,Universally connects to other modular cage systems Provides the perfect view to enjoy small pets This cage is ideal for Hamsters, Dwarf Hamsters, Mice and Gerbils. Measures 18-3/4-inch width by 5-1/2-inch depth by 19-1/2-inch height Critter Universe Hanging Hamster and Mouse Pet Cage Comes with Food Bowl, Water Bottle, Ramps and Exercise Wheel Hangs on the Wall and Provides a Perfect View to Watch Your Hamsters and Mice Easy to Clean Slide Out Droppings Trey Compatible with Other Brand Connectable Systems, Expandable Measures 5-1/2" Width X 18-3/4" Depth X 19-1/2" Height