As an alternative to other metals this Bioplast labret stud is comfortable to wear and is used in initial piercings. Bioplast is a biologically inert material which will not react with your body – making it safe for body piercings. This labret is suitable for a variety of ear piercings and also lip or Monroe. Externally threaded. 14 Gauge and 45mm in length. This labret is also used for Industrials.