Product Highlight(s):Chewbular Play Tubes are the charge-thru chew tube hip critters choose. Chewbular tubes are a barrel of fun for hamsters or gerbils 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. 6"L x 2.5" diameter Please note: Color specification is unavailable on this item