The Chuckit! Fetch Medley 2 is a triple-pack dog toy of Chuckit! Fetch Balls. Includes a Chuckit! Strato Ball, Erratic Ball and an Ultra Squeaker Ball. Each design is made to provide your dog with three fun different ways to play fetch. They are all made from natural rubber that is easy and safe for your dog to grip in their mouth, and they're sized just right to work for dogs from small to large. These Medium-size balls are compatible with a medium Chuckit! launcher.