Material is plastic Leg bands for pigeons and cockatiel parrots only, or birds with weak beaks or problems. Also for chickens of any type. Clip-on leg band means you can remove and reattach it, strong and locks well. Add any name, whether the animal's name or the owner's name. Add a serial number. All sizes are available: 4mm 6mm 8mm 10mm 12mm 14mm 16mm 18mm Cockatiel parrot: 4 to 6 Pigeon: 8 Chicken: 10 to 14 Features: 1 - Clip-on for all ages, fits whether the animal is big or small. 2 - You can remove and reattach the band. 3 - Hard, strong plastic. 4 - Plastic made from natural bamboo. Price starts from 5 per piece. 3-day warranty if it breaks. For large quantities, we offer a discount. We ask you not to haggle over the price because this work is a trust, honest, and hard-earned!!