The below measurements are approximate:
- The 20g and 18g labrets have a 2.4mm fixed back disc
- The 16g labrets have a 2.9mm fixed back disc
- The 14g labrets have a 4mm fixed back disc
These threadless labret posts will work with almost all threadless ends, except for ones from Invictus. However, ends with pre-bent pins may be an extremely tight fit for the 20g labret posts due to the similarity of the gauge of the threadless pins and the diameter of the post's insertion point.