The Kaytee CritterTrail Run-About Small Pet Habitat provides a spacious living area for a variety of small animals, including hamsters, gerbils, and mice. Accessories include customizable climbing tubes, an exterior exercise ball, look-out tower, and essentials like a water bottle and food dish. Spacious habitat for all hamsters, gerbils and mice Includes water bottle, food dish, exercise ball and more Expandable with additional Kaytee Fun-nels accessories