14 Gauge(1.6mm) Internally Threaded Surgical Steel Horseshoe Ring Circular Barbell - Sold in Pairs Material: Surgical Steel Bar Thickness: 14 Gauge (1.6mm) 4mm balls on the 3/8" & 7/16". 5mm balls on the 1/2" Internally Threaded Sold In Pairs You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!