Alien Style Piercings Labret Lip Dimple Earring Tragus Helix Daith Earlobe Stud Ring Body Jewellery 16g. The Piercing Gauge is 16g (1.2mm), Bar Length (Attached 6mm,8mm,10mm Shafts). The Alien Height is 6mm(0.24″). Alien Head Is Made of Brass, Rod Shaft Is Made of 316l Surgical Steel. Internally Thread Fit. Anodised Plating with Smooth Surface.