KONG Extreme Black is the toughest, most durable chew toy for your four-legged friend. Made from an ultra-durable black rubber compound, this toy is designed to stand up to the toughest chewers. Perfect for aggressive chewers, KONG Extreme Black is the perfect way to keep your pup occupied and help prevent destructive chewing habits. The hollow center can be filled with treats to help keep your pup engaged. Plus, its unique shape and texture encourage positive chewing habits.