Living World’s Exercise Ball provides a safe, mobile environment that lets small pets get the exercise they need. Simply place your pet inside the Exercise Ball for safe, interactive and healthy activity, and be sure to monitor your pet closely. Exercise is very important for small animals, as it helps keep them strong and healthy. The Exercise Ball is made from non-toxic, clear plastic and is well-ventilated to ensure continuous air circulation. Cleaning is easy, just use warm water and a mild detergent and rinse thoroughly. Recommended size for smaller hamsters and gerbils. 6.6" / 17 cm Exercise balls can be beneficial and fun. The key is to use it SAFELY: Supervise pets at all times. Ensure you are using the correct size ball for your species. Ensure that your pet is ready for exercise and comfortable. Clean before & after each use. Make sure the ball is closed securely before use and has the proper ventilation slots. Avoid the sun, use only indoors in cool areas away from hazards such as other pets. Limit roll time, start with a few minutes per session and add on gradually.