The Chuckit!?Super Crunch Ball combines classic Chuckit!? Balls with a crackling, crunchy sound your dog will love! Designed to satisfy a dog's instinctual curiosity for sounds, the Super Crunch Ball has a patented crackle that is safely contained inside the ball and will not break down with use. Made with durable TPR, these Chuckit! Crunch Fetch Balls have a 2.5" diameter and are compatible with medium Chuckit! Launchers.