Internally threaded curved barbell, 6 gauge Home » Curved Barbells | Internally Threaded Jewelry | Large gauge | Male Piercing | Stainless Steel Shown: 13mm curved barbell. Type: curved barbellMaterial: 316L surgical stainless steel, implant gradeLength: optionalGauge: 6Ball size: 5/16" (8mm) Your Price: $ Length: ----- Choose One -----1/2" (13mm)5/8" (16mm)3/4" (19mm)Quantity: