Description: 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 Package incluede: 1 x blue ball + 1 x orange ball