45 Unconditional Money back guarantee - 2-year free repair warrantyMetal stamp: 10kClosure: ScrewFinish: PolishedMeasurement: 7mmTheme: Body jewelry, Piercing BarbellsSafety: hypoallergenic - nickel-free10K Solid Gold Circular Barbells 16 Gauge. It is hypoallergenic and can be used for nose and septum piercing. Length: 5/8" long (16 Gauge). The screw on design makes it comfortable and secure to wear