Inner diameter: 8mm Outside diameter: 10mm Width: 7mm material: plastic Fixed: Clips Color: Green / Orange / Dark Red / Light Blue / Light Red / Dark Blue / White / Yellow / Purple / Pink Sales Specification Quantity: 1 bag = 100 pcs Packing specification100 pcs / 1 bag Application object: birds and pigeons Packing style: OPP ziplock bag Name: Pigeon foot ring Product advantages: light weight, do not harm the pigeon's feet, the pigeon action barrier-free. The snap fastening effect is good and does not fall off.