Chewbular Play Tubes are the charge thru chew tube hip critters choose. Chewbular tubes are a barrel of fun for pet rats, guinea pigs, or chinchillas that accommodate pets' natural chewing and burrowing instincts. Plus, every Chewbular includes a generous FREE sample of Super Pet's Night E Night bedding material. For: Chinchillas, Guinea Pigs, Pet Rats 9"L x 4" diameter