Backyard Feed -16 Pack Anti-Crow Chicken Collar Rooster Collar for Poultry Chicken Duck Highlights Generic Brand 16 Pack Anti-Crow Chicken Collar Rooster Collar for Poultry Chicken Duck Description: Made of Nylon , safe and durable for chicken duck goose to wear. Easy and convenient to wear. Suitable for chicken, duck and other poultry. Can effectively prevent the rooster from crowing disturbing the rest of neighbors. Size: about 18x2cm/7.08x0.79inch Package includes: 16x Chicken Collars Note: Since the above size is measured by hand, the size of the item you received may be slightly different of the above size. Meanwhile, please be reminded that due to lighting effects, monitor's brightness/contrast settings etc, there could be some slight differences in the color tone of the pictures and the actual item.