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 Perfect Design: There is a toothpaste injection port on the top, and the toothpaste is automatically dispensed into the toothbrush by biting and squeezing. Stabilize the base to make it easier for pets to hold the toothbrush. The soft bristles cling to the dog's teeth. Clean the teeth on both sides of the dog. Deliberately-design. ++ Fit in most kinds of dogs' mouth comfortably and easily. Built-in Toothpaste Reservoir for Self-dispensing toothpaste for cleaner teeth. NOT INTENDED AS CHEW TOY - The dog toothbrush is not intended as a chew toy and should not be given to dogs independent of owner use. Proper owner use and supervision is required.