This tiny crystal flat back single stud features a front threaded screw-on closure. Worn on helix, forward helix, flat, tragus, conch and upper lobe piercings.| Lead and Nickel free. Sold as a SINGLE earring, purchase 2 for a pair Gold Vermeil (Thick layer of Gold plated over Sterling Silver) White Zirconia Gemstone Crystal diameter 2mm(0.08in) Post Length 6mm, Thickness 1.2mm(16ga) Front threaded screw closure on 3mm heart flat back .925 #J025-2G Helix Piercing Stud, Double Helix Piercing, Knots Jewelry, Lobe Piercings, Upper Lobe, Jewelry Gift Guide, Tragus Conch, Forward Helix, Moms Bracelet