KONG Stuff-A-Ball Rubber Chew Toy - Medium - The KONG Stuff-A-Ball helps support your dogs' chewing behavior. Made from the KONG Classic rubber, this ball fulfills instinctual needs to chew while cleaning teeth and gums. KONG ridges turn this toy into a fun treat dispensing challenge. To extend playtime stuff with KONG Snacks and KONG Easy Treat. Promotes healthy teeth and gums Stuff with treats, pastes or peanut butter Fun to chase and cleans teeth Made in the USA. Globally Sourced Materials. Available in three sizes: S, M and L