Gnex 8mm Black Tungsten Ring with Blue & White Line Carbon Fiber Wedding Band Size 6-13 Half Size Black Tungsten Ring with Blue & White Carbon Fiber,True Tungsten Carbide Unisex Wedding Band 8mm Wide and Conform Fit Finish on the Inside of the Ring for more Comfortable Wear. All of Tungsten Rings are Cobalt Free, Hypoallergenic, High Polish, Conform Fit Design. Classic and Durable,The Perfect Gift for Valentines Day/ Birthday/ Mother Day/ Father Day/ Wedding/ Engagement / Anniversary / Christmas Gifts Jewelry. Tungsten is Extremely Hard,Will Keep Its Shine Forever.