Clear CZ Gem Internally Threaded Prong-Set - Stainless Steel 16GA 5/16" Long - Choose Gem Size Square CZ Prong Set Ends Internally Threaded 316L Surgical Steel Eyebrow Curved Barbells You receive one eyebrow curve ring Thickness: 16GA (1.2mm) Length: 5/16" (8mm) 316L Surgical Steel. Choose gem size - 3mm or 4mm. 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!