Description: Stable and anti-rollover make small animals to play safely. It does not jam and runs more safely preventing hamsters from pinching their feet during exercise. Not only can the sport wheels toy help small animal to exercise consume part of their physical strength help them maintain a good body shape but also play a role in relieve stress and boredom. Made of eco-friendly plastic material the hamster toy is durable and ensures the health and safety of pets. The diameter of the product is about 12cm and the width is about 6cm. It is suitable for hamster guinea-pig hedgehog squirrel chipmunk golden bear rat and other small animals. Item Name: Hamster Toy Material: Plastic Features: Bite Resistant Eco-friendly Easy Installation Size Details: Diameter: 12cm/4.72 (Approx.) Width: 6cm/2.36 (Approx.) Notes: Due to the light and screen setting difference the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Hamster Toy