Barbell Material: Stainless Steel Top Material: Copper with zircon Barbell Length: 6mm Thickness(Gauge): 0.8mm(20Gauge) Steel Ball size: 3mm color:silver gold quantity: sold by 1 piece(single) 7uanX They are all available choose style: #1/#2/#3/#4/#5 #earrings #lobepiercing #helixpiercing #stainlesssteel #20gauge