Eco-Friendly Material: The hamster ball is made of non-toxic and odorless plastic, ensuring a safe and comfortable environment for your hamster. Lightweight and durable, it provides a long-lasting and enjoyable space for baby hamsters. Transparent Visibility: The hamster jogging exercise ball features a transparent design, visually creating a spacious and bright play environment for pets. The hamster ball has a diameter of 14.5 cm/5.72 inches and is suitable for small to medium-sized rodents. Optimal Ventilation: The pet wheel has specially designed vents that promote continuous airflow to keep your hamster cool and comfortable while playing. The design also prevents your little hamster's paws from getting stuck. Secure One-Sided Opening: The one-sided opening button cover ensures your hamster can enter easily and stay safe. The central cover fastens with snap points to prevent accidental opening, providing peace of mind even during fast runs. Wide Application: The dwarf hamster ball can run on the floor, can be hung inside or outside the cage, and can stand and be used independently. It is a very suitable toy for entertaining hamsters, relieving boredom and protecting their health.