CritterTrail Extreme Challenge Habitat for hamsters gerbils and mice. The rotating pet-powered activity wheel and spiral slide provide hours of fun activity. Removable Petting Zone allows for easy interaction and is a safe resting location. Enhanced door locks offer easy access and a secure closure to keep your pets safe. Improved construction allows top wire and bottom base to easily detach for effortless cleaning and maintenance. New narrow wire spacing design make these habitats safe for dwarf hamsters mice and other small animals. Create a dream environment with expandability ports that allow connectible accessories to be added. Easy to clean construction with deep base. Well ventilated environment. Comes complete with water bottle and food dish removable petting zone and activity wheel. Actual size 20in long 11.5in wide 18in high.