16g 16 gauge 1.2mm 5/16 8mm steel spiral barbells eyebrow twist stud bar AUST Body Piercing Jewelry 5Pcs Number of Item(s)::::5 Pieces Jewellery Types::::spiral Body Piercing Parts::::Eyebrow,Ear,Tragus Product Materials::::316L Surgical Steel stem Gauges::::16G(1.2mm) ////Length / Diameter::::5/16 Inches (8mm) ////Ball Sizes::::4x7mm Steel Double Balls