Jolly Ball is an easy and effective way to keep your horses happy. This durable equine toy is a great way to keep your horse happy and offers a way to utilize energy throughout the day. Throw Jolly Ball out to pasture or hang it in a stall to keep your horse well-mannered and eliminate stall boredom. Does not need air to inflate. Jolly Ball is made from 100% non-toxic polyethylene plastic which makes them extra durable, float and bounce. Measures 10 inches diameter.