1pc 4.7 Inch / 1pc 6.29 Inch Hamster Ball, Running Ball Toy, Transparent & Breathable, Promotes Exercise & Health, Relieves Stress, Easy To Clean, Hamster Running Ball, Exercise Ball, Small Pet Outdoor Running, Rolling Interactive Stress Relief Golden Bear Toy Supplies Non-Slip Quiet Running Toy, Transparent Hamster Ball, Breathable Design.