Titanium 4 Gem Cluster Threaded Tops. TICL416 fits M0.9/16g and TICL414 fits M1.2/14g Internally Threaded Jewellery. Made of Implant Grade High Polish Titanium (TI-6AL-4V ELI ASTM F136). 16g tops fits our 18g Labrets. Dimension: 7mm L x 6mm W x 3.3mm H