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.