Striker - All Stainless Steel toy consists of a tube, washers, nuts, rings, rectangular tag, all on a 3.0mm stainless chain. All orings are welded. This toy is intended for the larger birds such as large Macaws and large Cockatoos. The large ring at the bottom inside dimension is 1-5/8" diameter so be sure your bird's head can not fit through it to pose a threat. This toy measure 10" in length and 2" wide at bottom of toy. Choose if you want a quick link or not from the option.