Titanium Threadless Opal Front Facing Top comes in 1.5mm, 2mm, 2.5mm, 3mm and 4mm Synthetic Opal and fits into any threadless barbell or base.
Manufactured out of High Polish Implant Grade Titanium (Ti-6AL-4V-ELI ASTM F136).
To secure the inside bar or base, add a slight bend to the pin by simply inserting the pin half way and pushing the top to one side. 
Pin Gauge: 25g