316L Surgical Steel Barbell with UV Coated Acrylic Multi Gemmed Ball and UV Coated Acrylic Ball. Sleek Surgical Steel Barbell With Ultraviolet Coated Acrylic Ball With Cubic Zirconia Accent And Ultraviolet Coated Acrylic Ball. Bar Size : 14 Gauge x 5/8" Ball Size : 6 mm Available in 8 colors