1.Sufficient Supplies: there are 12 pieces of adjustable reflective nylon pet collars with durable metal buckle in the package, which are enough to meet your daily use and replacement; Suitable for those who have multiple dogs at home or who run a pet shop 2.Comfortable and Soft to Use: the inner lining of the dog collar reflective is made of neoprene and cloth, which is soft and comfortable, will not hurt the dog's neck, and can effectively control the dog at the same time 3.Reflective Design: the nylon dog collar is made of reflective nylon to add visibility and to reflect light when illuminated at night, keeping your puppy while walking, training or running at night 4.Easy to Adjust: large size, approx. 17-24 inches/ 42-60 cm, and approx. 0.98 inches/ 2.5 cm in width, allow you to adjust the length according to your puppy's neck size, easy to slip in, suitable for most medium sized dogs; In order to avoid the risk of choke, please don't fasten the dog collar too tight