3 sizes of dog toothbrushes: Suitable for all Small Medium Large Dogs. Choose the right size based on the size of the dog. Made of high quality rubber, nontoxic ,durable, 360-degree bristle configuration, bite resistance and easy to clean Material: Nontoxic Natural Rubber. Soft, Washable and Safe. PROMOTE CHEWING: The material used in dog chew toys can exude meat flavor. Let your pet fall in love with brushing teeth and no longer resist. Automatically dispense toothpaste, clean teeth.