Internally threaded circular barbell, 4 ga Home » Circular Barbells | Ear Piercing | Internally Threaded Jewelry | Large gauge | Male Piercing | Stainless Steel Shown: 13mm circular barbell.Material: 316L surgical stainless steel, implant gradeGauge: 4 Type: circular barbellDiameter: optionalBall size: 5/16" (8mm) Your Price: $ Diameter/ball size: ----- Choose One -----5/8" (16mm) with 3/8" (10mm) ball(s)3/4" (19mm) with 3/8" (10mm) ball(s)7/8" (22mm) with 3/8" (10mm) ball(s)Quantity: