16pcs DIY Hamster Tubes External Tubes Hamster Cage Connection Tunnel Tracks

They are convenient to install on the pet cage firmly, not easy to break or fall off. Also, a funny toy for your lovely pet.|Sturdy material, easy to observe hamster activities, so that you can see your beloved pet at any time.|DIY tunnel toys test practical ability and thinking, conducive to the cultivation of spatial thinking.|Good toys for your pets, your pets will enjoy a funny and happy playing time.|Can be used outside the cage, easy to install and disassemble without any problems.