- SAFE FOR PETS: Solid running surface, completely safe for your pet’s tail and feet. 2. Material: plastic disc + steel bearing, durable and safe to use. 3. Dimensions: 18x18x11cm. Suitable for hamsters, rats and other small animals. 4. Function: Provide your pet with more to explore and climb. Cute little exercise wheel for pets to train their toes and nails. 5. Benefits: keeping the hamster healthy and active. The exercise wheel can greatly arouse your pets’ interest in exercising and keeping them healthy. Scope of delivery: hamster toy*1 Warm advice: Dear buyer, due to lighting effect, monitor’s brightness, manual measurement etc, there may be some slight differences in the color and size between the photo and the actual product. Sincerely hope you can understand! Thank you!