Check the listing for details. Kaytee CritterTrail Fun-nel 5-Pack Straight Small Animal Habitat Tubes. Condition: New. Listed at 17.89 USD. CritterTrail Fun-nels Value Pack Tubes CritterTrail fun-nels value packs are the perfect way to start expanding your CritterTrail home. The Bubble Wave tube design features a comfortable 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. If you can imagine it, you can build it with CritterTrail fun-nels. The tubes are available in a variety of colors, shapes and sizes so you can create a huge playground for your pet. Allows for expansion of Critter trail habitats Includes a variety of fun-nel connector tubes and connector rings For hamsters, mice, gerbils or other small animals 9-3/4-Inch long, 16-inch wide, 2-inch high Each kit contains everything you need to expand your critter trail home