[Hypoallergenic] These threadless lip rings/helix studs/Tragus studs are made of 316L stainless steel. [Package] Total 3pcs Lip Rings Threadless Push in studs piercing jewelry, with a black velvet pouch. [Size] Bar Thickness: 16 Gauge (1.2 mm), bar length: 6/8/10mm. [ Using] Can be used as nose piercing jewelry, helix earrings, conch helix piercing jewelry, lip rings, labret stud, medusa piercing jewerly, other body piercing jewelry.