CritterTrail Fun-nels Straight 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 three sizes of Fun-nels Tubes (five tubes total) and Fun-nels Rings. With the Fun-nels Straight 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: 1.75" Tube 2 ea. 10" Straight Tubes 2 ea. 3.5" Tubes 4 ea. Connector Rings SUPER PROTECT Antimicrobial Technology is built into all plastic interior surfaces providing a healthier, cleaner habitat for your pet