This flat back labret is made from 316LVM ASTM F-138 implant grade stainless steel. It is internally threaded for comfort during insertion and has a countersunk titanium halfdome end for a precision fit. The 5mm titanium disk also unscrews. 3mm disk also available on 16g, 14g and 12g. Both the end and disk are 6AL4V ELI F-136 implant grade titanium.