Give small pets or hamsters a healthy and safe way to exercise. Transparent design, gymnastic ball for small animals lets you clearly see how hamsters do sports. You can play with your pet and have more fun. Br> The hamster ball is easy to install and a good toy for hamster entertainment. Br> Suitable for hamsters, gerbils or other small animals. < Br> The Hamster Running Ball is made of high quality plastic and is lightweight and durable. This hamster fitness ball has a diameter of 12 cm. If your hamster is smaller, you can.