Kaytee FerreTrail Flex-E Fun-nels, Colors Vary Flex-E Fun-nel stretches to 8-foot to create plenty of hiding places and tunneling space for your pet Easily connectable to various ferretrail products, by using a ferretrail connector ring (sold separately) so you can build your own playground system Encourages exercise and hours of fun and healthy playtime for your pet Compact tube expands to a full 8-foot long tunnel for play For ferrets, guinea pigs, pet rats, chinchillas, and other small animals