General purpose numbered leg bands for poultry. Used to identify individual birds within a flock (for example, a bird with an injury that is being monitored for healing) or to identify laying hens in a flock of different ages. Numbered bands can be used to further identify birds in a flock already banded in the same colour - for example 500 hens already tagged with un-numbered yellow bands but you need to identify 20 of them for treatment, injury healing and more. Available as a package of 20 yellow bands numbered 1 through 20.