Our Stainless Steel Curved Barbell is crafted from durable 316L grade steel and sold individually. It is externally threaded and comes in a variety of sizes and ball sizes for your convenience. 16G, 14G, 12G, 10G, 8G, and 6G inner lengths ranging from 1/4" to 3/4" and ball sizes of 3mm - 6mm are available. Choose the perfect size for your piercing needs! Please note that the 18G 1/4" (6mm) size can vary by 0.5mm.