CritterTrail Fun-nels Assorted Tubes are the perfect way to start expanding your CritterTrail home. 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. You get variety of Fun-nels Tubes (eight tubes total) and Fun-nels Rings. With the Fun-nels Assorted Tubes, you can start turning your CritterTrail habitat into a fantastic fun-nel city! For hamsters, mice, gerbils or other small animals. Set includes the following Fun-nels and accessories: G 1.75 Tube G 3.5 Tube G 10 Straight Tubes G Tee Tube G Bubble Plug G 3 ea. Elbow Tubes G 8 ea. Connector Rings