Crucial by Diablo Organics 16g titanium "Punk" clicker with spikes. Available in multiple diameters. 

In-house Anodization: We are able to change the color of the metal of this product in-house. If you want a non-listed color please select HIGH POLISH as the jewelry color (if available as an option, if not please disregard) followed by your desired metal in the Anodization menu.