Description Removable design makes assembly easier. Silent bearing hamsters play at night without affecting the sleep of the host. Provide a safe environment for sports and play for your little pet. Great for hamsters, gerbils, mice and other small animals. Transparent color, easy to observe the movement status of small pets. Specifipetion: Material: Acrylic. Size: 13cm in diameter. Color: clear. Note: There might be a bit color distortions due to different computer resolutions. There might be size errors due to different computer resolutions. Package include: 1 * hamster running wheel.