Habitrail OVO Dwarf Hamster Cage, Small Animal Habitat, Hamster Accessories Modular habitat utilizes the smaller tubing of Habitrail Mini trails and is compatible with all other Habitrail items Provides endless hours of entertainment for your small animal Easy-to-clean, easy-to-assemble habitat solution for your dwarf hamster or mouse Includes everything you need to get your pet's home started Fully expandable and ready to grow - limited only by your imagination