Internally threaded circular barbell, 6 ga Home » Circular Barbells | Ear piercing | Internally Threaded Jewelry | Male piercing | Stainless Steel Shown: 13mm circular barbell.Material: 316L surgical stainless steel, implant gradeDiameter: optionalType: circular barbellGauge: 6Ball size: 5/16" (8mm) Retail Price: $8.61Your Price: $ Diameter: ----- Choose One -----1/2" (13mm)5/8" (16mm)3/4" (19mm)Quantity: