Runner ball: Exercise while playing! For dwarf hamsters. Can also be used as a temporary shelter when cleaning the cage! Exercise equipment for dwarf hamsters! SANKO 4976285 303340. Dwarf hamster. For small hamsters. For hamsters classified as Phodopus. For Chinese hamsters. For small hamsters. Pet. Health. Stress relief. Transparent. Clear. BALL. Ball. Sphere. Rolling. Eliminates lack of exercise. Thank you very much for your interest in the product. This is a runner ball that I cherished. Since it is a used item, there are small stains and scratches. The box has significant damage. Please refrain from purchasing if you are sensitive to such things. I would appreciate it if you could check the photos carefully. Everything in the photos is included. The measuring tape and scale are not included. The item will be sent via non-standard-size regular mail. Thank you for your understanding.