This Tag is made of stainless steel: Light weight, silent & Multi-functional. The tag is very light and your dog will never find it; not only for collars, it also can be used on harnesses.No jangle design means quiet for you -- silent dog tag. No dangle design means chew-proof and not annoying for your pet. Curved shape matches the shape of your pet's collar; looks much better than flat tags. Made of rugged, 1/16 thick stainless steel. These Tags are Durable. These Tags work with flexible collar Dog Collars & Leashes, Dog Collar Tags, Pet Id Tags, Dog Tags, Dog Tag, Pet Tags, Custom Dog Ornament, Pet Collars, Collar And Leash