Poultry Bird 1-100 Numbered Leg Bands 9.5mm Inner Dia Rings Clip Pack of 100 (Black) material:plastic, easy to remove and reuse inner diameter is 9.5mm,1-100 numbered on the clips the rings split in half on a small hinge making them easier to put on the leg suitable for various poultry ,birds,hens,pigeon and ducks 100pcs in one package