From the listing:
"40 Brass Bullseye collars or washers for repair of old Sheffield straight razors. These brass collars are made as exact replicas of the original bullseye collars made by Cutlers in the 18th and mid 19th centuries. * These collars are stamped/punched from 26 guage brass sheets and are .19 inches wide and .05 inches thich. They provide the finishing touch for the larger Wade and Butcher razors and similars Sheffield straight razors. *They come unpolished and shine up nicely as seen in the sample photos of the finished product. These collars are a must have for straight razor restoration enthusiasts. You will receive 40 bullseye collars that will look similar to the sample shown in the first photo. Does not include 1/16 in. brass pins or small retaining under washers #0 which are available at microfasteners.com. "