Material: The pet ID tag is made of high quality plastic,it is nickel-plated,non-rusting,and it has no sharp edges to protect your pet from injury.Good quality and well made,durable,very solid construction. Package includes: 6 pcs in different colors, it is convenient if cats and dogs do lose their collars quite often. The owner's contact details can be written inside, help others to contact you if your cat or dog likes to disappear sometimes Design: Comes with an address insert inside.Capsule design,seal and keep your personal information not public.Comes with a piece of paper inside to write your info, you can write all information. Advantage: Lightweight and quiet,small size,but the paper inside is big enough to put the pets details in.Fits well on collars and not heavy,so cats and dogs are not bothered by it.Convenient to carry around Use reminder: These little barrels are ideal for pets as they are sturdy and unobtrusive,it's nice and clear;Perfect size for cats,pet and other small animals