All of our items are Brand New!! Metal: 16G 6mm Surgical Stainless Steel Gemstone Type: 3mm-6mm Cubic Zirconia Special Finish: High Polish Size / Style: Prong Set Ball Back Forward Helix Product ID: J658z These rings a very bright and unique. These are ball backings. instead of the usual flat back. the ball unscrews and the post if externally threaded.