Titanium Threadless Pronged Round CZ Trinity Top is manufactured from High Polish Implant Grade Titanium (Ti-6AL-4V-ELI ASTM F136). Compatible with any Invictus Threadless bar or base in any gauge. Top Size: 5mm (L) x 1.6mm (W); Gem Size: 1.5mm; Pin Size: 0.45mm x 4.7mm.