Features: Hamsters are small animals that like to exercise very much，If kept in a cage for a long for time,Very bad for health, toys can Provides the amount of exercise it needs, which is great for hamsters.The muscle stretching and myocardial function are very beneficial,It can greatly extend its life. Solid non-slip surface for pets feet, easy to clean and odor resistant. Your pet will love running on the UFO sports wheels. The striped design increases friction and prevents the hamster from slipping while providing a run-up. The hamster spinning wheel is noiseless and very quiet. Specifications: Material:Plastic Size:Approx.18cm/7.09in Color:Blue/Pink Package Includes: 1xHamster Running Wheel note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.