Internally Threaded Curved Barbell, 6 Gauge Home » Curved Barbells | Internally Threaded Jewelry | Large gauge | Male piercing | Stainless Steel Material: 316L surgical grade stainless steel Gauge (Thickness): 6 (4.0mm)Threading Type: Internally ThreadedType: curved barbellShown: 13mm curved barbell. Retail Price: $9.59Your Price: $ Length: 1/2" (13mm)only this length is available Ball size: 1/4" (6mm)only this ball size is availableQuantity: