1pc 316L Steel Internally Threaded Bent Curved Barbell Bridge, PA, Eyebrow Ring 1pc 316L Steel Internally Threaded Bent Curved Barbell Bridge, PA, Eyebrow Ring Fast Shipping - Select desired Gauge/Length/Ball Size from the above menu Material: 316L surgical steel All our products are brand new and never worn! Millimeter to inches conversion: 6mm = 1/4" 8mm = 5/16" 10mm = 3/8" 11mm = 7/16" 12mm = 1/2" 14mm = 9/16"