Jovivi 4pcs 16G Mixed Clear Cubic Zirconia Crystal Internal Threaded Acrylic White Bioflex Monroe Labret Lip Bar Ring 5/16" 4pieces in differen shapes (Round,Heart,Square,Star Material: Acrylic, CZ(Cubic Zirconia) Gem Size3mm.Gauge:16g(1.2mm).Bioflex Bar Bar Length - 5/168mm 16 gauge BioFlex labret & monroe piercing jewelry. Flexible, comfortable alternative to metal-based piercing jewelry