DURABLE: These bells are easy to clean, easy to store and withstand strong pressure and weight. MULTIPLE FUNCTIONS: Our training bell is very suitable for potty training for pets, as a communication device or as a great toy, e.g. e.g. to give the pet a few snacks when he presses on the bell. Its going to be funny. Widely used: This one size fits all bells is perfect for all pets, whether its a puppy or a new dog. The bells are perfect to bring them to your routine and make your life easier. Practical: These are small enough for dogs of all sizes and the bells work with little effort. They can be easily placed at home or next to the trash basket. NOTE 1. The size of the product is measured manually, and there will be an error of 2-3mm due to factors such as different measurement tools and measurement methods. 2. This product is all taken in kind, but due to differences in photography, lighting, color deviation, and personal understanding of color. As a result, there may be some color difference between the actual product and the photo, and the color is subject to the actual product. 3. Please take good care of our products~