Ware Critter Fun Tunnel for small animals is a colorful tunnel that expands up to 2.5 feet with a unique accordion design that allow twists and turns to form fun shapes as well as a compact storage. It fits inside any cage for your critter to instinctively crawl in and out and all about, providing a healthy life and a sense of safety and security. Ware Critter Fun Tunnel is made of durable, washable, stain and odor resistant plastic that is safe and non-toxic. Ideal for guinea pigs, ferrets, chinchillas and rats. Assorted colors.