King Will GENTLEMAN 8mm Black Tungsten Carbide Ring Green Carbon Fiber Polished Finish Comfort Fit Modern and fashionable, this tungsten carbide ring will bring a stylish feeling to any look. Excellent tungsten carbide with comfort-fit design, which provides durable and comfortable Tungsten carbide rings will serve as a delightful gift! It is also considered to be a special gift for men. King Will's jewelry box, save your giftwrap service fee, and help you store the ring much safer & longer. If you have any question, please post into "Customer Questions & Answers" at the bottom of this page.