Made of nylon material, safe, durable for chicken duck goose to wear.Suitable for chicken duck goose and other poultry.Can effectively prevent rooster from crowing disturbing neighbors rest.Product size: ordinary 2*18CM Upgrade model 2*20.5CMColor: Black ,RedPackage Includes:2 Pieces Chicken CollarsNote:1. Due to the light and screen difference, the item's color may be slightly different from the pictures.2. Please allow 1-3mm differences due to manual measurement. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!