Fun-nel Tubes are the ideal way to expand your CritterTrail habitat. Easy to connect and pull apart so you can add space for more roaming area in minutes. The Bubble Wave tube design features a comfort grip that is safe for your pet's paws. Connector Rings snap on easily to ensure a safe and secure passageway. Easy to clean, tubes pull apart and snap back together for trouble-free cleaning. Buy any of our wide assortment of Fun-nel tubes and accessories to create your own unique habitat for your pet. Universally connectable and come in assorted colors.