MaterialThe pet ID tags are made of high-quality brass, which is small and light, strong and durable. There are no sharp edges and will not harm your pet. SizeThe size of the barrel tube collars is 8*21mm. Please pay attention to the size before placing the order. FeaturesCapsule design, with a circle of mini cat name tags, convenient to hang on the pet's leash or collar, and hide the information inside to protect privacy. Easy to useKnob design, close fit and not easy to fall off, prevent water seepage or self-opening. Therefore, the ID card information is always kept clear and tidy. ApplicationThe pet identification tag with a ring can be easily hung on the pet collar. It can also be a beautiful trinket to make your pet more cute and attractive.