The inner diameter of the foot ring is adjustable, 1.4-2.1cm Features Easy to wear and not easy to fall off Can be customized with laser engraved numbers or numbered with a special marker Available in a variety of colors, easy to disassemble and reusable It is recommended that the thickness of the experimental chicken foot pole be 1.2cm, and that the experimental duck and goose leg pole should be used with a thickness of 1.4cm.