Reliable Material:Dog collar bell is made of high-quality iron, with smooth chrome plating, corrosion resistance, firmness, and long service life. Easy to Track Your Pet:With these dog collar bells loud, you don't have to worry about not finding your pet when walking down country roads or entering bushes, these dog tracker bells are perfect for keeping tabs on your pet's whereabouts. Removable:Dog and Cat Collar Bells is designed with a key ring, which is easy to install and remove. You can easily install the bell on the ring of the dog collar. It is suitable for most pets; It can be easily removed from the collar or other pendants when not in use. Size Information:each pet tracker for cats bell measures about 1.57 inch in diameter, suitable for most small medium and large pets,each set including 2 bells,There are 4 sets in total. Practical Gifts:the cat bells for collars loud are cute in appearance, practical in function, which are very nice gifts for your pets, they can produce crisp ring to remind birds.