The product includes two hamster running balls in different colors (pink and yellow), suitable for meeting the daily exercise needs of hamsters. The diameter is 12 cm. Please measure your pet before purchasing. This provides a safe and comfortable space for pets to sleep or play.High Quality: The transparent hamster ball is made of high-quality, environmentally friendly plastic with ventilation holes for safety and breathability. Durable and resistant to damage, it is easy to clean and odor resistant, helping to alleviate pet boredom.Transparent and Unique Design: The transparent design allows clear visibility during hamster training. You can observe your pet's movement inside the ball at any time, enhancing interaction and enjoyment.Easy to Use: The cover features a snap fastener for easy installation. Simply align the button on the cover with the corresponding position on the running ball and secure it tightly. The ball includes a safety vent to ensure your pet remains safe during use.Widely Used: Suitable for hamsters, mice, gerbils, guinea pigs, and other small animals. Provides a safe and comfortable environment where small pets can sleep or play.