CritterTrail One Level Habitat offers spacious living space for all hamsters, gerbils or mice, plus a cool removable "Petting Zone" area. The “Petting Zone” is a special area of the home that you can open so you can pick up your pet or provide them with a tasty treat. CritterTrail One Level Habitat comes complete with a water bottle, food dish, safe and silent exercise wheel. It also have multiple expansion ports for connecting additional CritterTrail tubes and accessories to the home. Size: 20"L x 11.5"W x 11"H.