Emours Run-About Mini 4.8 inch Small Animal Hamster Run Exercise Ball ,2 Pack Made with pet safe materials.Relieves boredom and increases activity level and giving him a fun spot to play Ideal for hamster, mouse and other small furry animals.Encourage healthy exercise in a secure and safe way Makes a great temporary holding area to keep your furry friend while you clean their home 4.7-inch diameter .For dwarf hamsters, mice, or other small animals Fun exercise toy to maintain your pet's alertness and agility.Provides interactive fun for the pet and the pet owner