This listing is for a single ASTM F136 implant grade titanium push-pin flat back stud. 2mm opaque stone is light blue-colored zirconia (note that color can look different in real life compared to digital, depending on monitor settings).
Post measures 1/4"" (6mm) in length. 18 GA
Colors available: 18K Gold Plated Titanium, Titanium Silver
*Please see site return policy for more information regarding flat back studs!