The Chuckit! The Whistler Ball 2 Pack Medium 6.5cm Dog Toy 6.5cm is a great way to add some excitement to your dog’s day. These two balls are made of high-quality natural rubber and are easy to clean. They also have a high bounce and are very durable, so you’ll never go back to another ball once you throw this one! Each pack contains two balls, one blue and one orange.