Pack of 12 Adjustable Whelping Pet Puppy Dog Cat Collars These multicolored whelping collars will help you to easily identify litters whilst they are young and will help to keep track of each one through their growth and development. They are made from soft velcro to not irritate or hurt your animals and are easy to clean and reuse. The material also ensures that they can adjust to the size of the neck as they grow. Product Specifications Material: Nylon Size: 30cm