Titanium (ASTM F136) 16g flat-back threadless “snap-together” flat-back (labret) post, with a 4mm disk back. This 16g post is designed to fit threadless tops (does not work with threaded tops). Great for nostril, earlobe, and ear cartilage piercings. By Neometal. Sizing Guidelines: Nostril/ear/lip 3/16": thinner than average healed piercings 7/32": thinner than average healed piercings 1/4": thinner than average healing piercings; average healed piercings 9/32": average healing piercings 5/16": average healing piercing; thicker than average healed piercings 11/32": thicker than average healing piercings 3/8": thicker than average or irritated healing piercings 7/16": very irritated piercings Remember that these are just guidelines, and that it’s generally safer to go longer than you think you need than shorter. ***REMEMBER*** You need to purchase some kind of end with these posts – gemstone, ball, spike – this is just the post.