Pets International Run About Ball Rainbow Rainbow Run-about Balls have been a favorite pastime for years, providing pets and pet owners with interactive fun during playtime. Sized perfectly for hamsters and gerbils, these colorful Run-about Balls provide the perfect outlet for your pet's excess energy. Available in four colors, Rainbow Run-about balls are a cool temporary area to keep your furry friend while you are cleaning their cage. For added safety, use your Run-about Ball on Super Pet's Hamtrac Raceway and provide your pet with a controlled exercise environment. * 7in Diameter * Suitable for all hamsters, mice and gerbils * *Please note: Color specification is not available on this item. Please note: Color specification is unavailable on this item