Overall transparent design allows the owner to visually observe the whole process of the hamster baby's movement, which is very interesting. Reinforced thickening, durable, long-term use is not easy to break, venting hole design, ventilation and ventilation, suitable for pets to play. Suitable for:hamsters, squirrels, hedgehogs, pigs, guinea pigs, chinchillas and small pets. Superior quality, simple and convenient assembly, is a good toy mouse playing sports. Cover design, don't worry that small pets will fall out, detachable design, easy to clean.