15 Different Colors -- Our puppy collars are available in 15 different colors. 15 colors of upgraded puppy collars provide an ideal solution to easily identify your puppy. Soft Materials -- Nylon and polyester, double-sided soft velor that won't hurt your puppy's neck, the soft fabric double-sided gives your pup's delicate skin more gentle care. Package Contents -- 15 Puppy ID Collars in different colors and enough to meet your needs. This pack of 15 colorful pet collars is designed to help discerning breeders from birth through to assigning a home to each of their newborn puppies or kittens. We recommend that you wait until your newborn is at least 5 days old before putting the collar on and make sure it is not too tight. Don't screw it too tight, because your puppy will get rid of it very quickly. Scope - Suitable for small pets from 0 to 8 weeks old, such as puppies and kittens. You can also