YSP1021 Features: * Fun nels tube * Expand any critter trail habitat or accessory * Watch your pet explore * 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 * Universally connectable, easily attaches to all Critter Trail, Habit rail and S.A.M. systems Includes: * Includes a connector rings Color/Finish: * Assorted colors Dimensions: * Dimensions: 10 D