These pavé bar flat back studs features a front threaded screw-on closure. Worn on helix, flat, conch and upper lobe piercings.| Sold as a pair. Gold Vermeil (Thick layer of Gold plated over Sterling Silver Front Bar 0.2x0.06in(4.5x1.5mm) Post Length 8mm, Thickness 1.2mm(16ga) Front threaded screw closure on 4mm disc flat back .925 #E221FL-G