Circular barbell with spikes, 12 ga Home » Circular Barbells | Ear piercing | Nipple piercing | Stainless Steel Gauge (Thickness): 12 (2.0mm)Type: circular barbellMaterial: 316L surgical grade stainless steel Shown: 13mm circular barbell with 5mm spikes. Retail Price: $10.34Your Price: $ Diameter: 1/2" (13mm)only this diameter is available Spike size: 1/8" (3mm)only this spike size is availableQuantity: