Internal thread.
3mm or 4mm synthetic opal.
Choose from white, pink/blue, light blue, sapphire (dark blue)
Popular for ear piercings including tragus and helix and lip.
Available in 1.2 x 6mm 1.2 x 8mm 1.2 x 10mm
Medical Grade23 Titanium: 6AL4V Eli ASTM:F-136