SIZE: expands to 2.5 feet (30" long x 4" diameter) Fun Tunnel expands to encourage exercise and fulfill your pets' instinctive tunneling behaviors. Provides security and relieves stress. Twists and turns to form shapes for use inside and outside the cage to overcome boredom and create a sense of safety and security. Made with safe, non-toxic plastic to be easily washable plus stain and odor resistant. Suggested for Sugar Gliders, Hedgehogs, Degus & other smaller mammals. Assorted Colors.