FOR Finches & Similar sized birds
Plastic colored split bands. They are numbered but the numbers are hard to see. They are just raised in the plastic but not painted so not visible really:)
Helps to identify different family lines or sex at a glance. Use a different color for each breeding pair.
The attached tool is all you need, simply split apart with your tool, and apply, then pinch back together.
Buy a strip of 10 in one color, available in 12 colors.
Imported from Italy