6 Rubber Ball Set - Medium6 Rubber Ball Set These durable rubber balls from Harry Barker are the perfect toy to keep your pup peppy! Playing fetch is a great way to provide the exercise needed to keep your dog healthy and happy. For hours of fun throw, bounce or launch the balls with a standard sized ball launcher for added distance. To clean after use, simply clean with gentle soap and rinse clean with water or toss in the top rack of the dishwasher!