The Run Around puts free wheeling fun and fitness right at your furry friends feet. Features chew proof construction, a ''tail safe'' stand, smooth and silent spinning, and a super safe mesh running surface. The Mini Run Around Wheel is designed to be very versatile and perform perfectly inside any pet's home. Can be used on the floor of any cage or glass aquarium or can be securely hung on the side of any wire home. For mice, gerbils and hamsters.