Sized perfectly for hamsters and gerbils, the hamster wheel provides the perfect outlet for your pet's excess energy. Hamster wheel also make a great temporary area to keep your furry friend while you are cleaning their cage. For added safety, provide your pet with a controlled exercise environment. Features - Color: Random Color - Material: Plastic and steel. - Size: 18.00 x 18.00 x 12.00cm/ 7.07 x 7.07 x 4.72 inch. - The small animal running wheel perfectly combines entertainment and sports. - The hamster wheel not only allows small animals to play happily. But small animals can also play a good role in exercise during entertainment. - This hamster wheel silent your hamster more active and healthy, and extend the life of the hamster. - Our small diameter hamster exercise wheels adopts a detachable shaft design which can be easily cleaned by wiping with a cloth. - So that your small animals can live in the silent runner wheel more comfortably. Package list: 1 x hamster exercise wheel