Provide a safe and healthy way to exercise for small pets or hamsters. Transparent design, Exercise Ball for Small Animal will let you see clearly hamsters playing sports, you can play with your pet, add more fun. Hamster ball is easy to install and makes a good toy for hamster entertainment. Suitable for hamsters, gerbils or other small animals. Hamster Running Ball is made of high quality plastic and is lightweight and durable. This hamster fitness ball measures 12cm in diameter. If your hamster is smaller, you can. Material: plastic Color: as pictures show Size: 12cm Scope of delivery: 1 x hamster exercise ball How to use Small Animal Ball Exercise: Place the hamster in the runner on the flat ground inside and outside, close the cover and place it on the ground for use. Make sure the hamster is in sight of the owner.