Shining labret studs to add to your jewelry collection! These internally threaded labret studs are made with durable ASTM F-136 titanium and a sparkling, tanzanite cubic zirconia gem on top. Length is 5/16" (8mm). Gauge size: 16G. Gem size: 3mm. 4mm rounded convex disk. Internally threaded with extended threading. Sold individually (1pc).