Autoclave safe Bioflex threadless labret post. Hole opening is 0.75mm so the metal pins on standard threadless tops will be too loose. Bioflex tops can vary in pin size from 0.74-0.78 but due to the flexibility of the material they all fit but you must use Bioflex brand tops. Disc backs vary from 3.5-5.5mm which is identified by last 2 digits in the numeric portion of sku, assorted sizes and colors.
