Size: 10" x 6" Chewbular Play Tube with Nesting Material is the charge-thru tube that critters choose. They accommodate your pets natural burrowing instincts. Plus, every Chewbular includes a generous FREE sample of Night-E-Night nesting material. Watch your pet pull the nesting material out, then use the tube to scurry through and nest in. Suggested for: Prairie Dogs, Chinchillas, Skunks, Opossums, Rabbits and similar sized animals.