[High Quality] Made of Pure Black Carbon Fiber, Natural Rosewood, Solid and Durable.Healthy material. [Advanced Technique] Unique Rosewood Inner Face, Smooth and Comfort Fit; Great Workmanship, Lasting Color Retention. [Fashion Design] Carbon Fiber and Rosewood Design, Masculine and Trendy. [Multiple Choice] 8mm Wide Size 6-15 Available, Multiple Choice, Fit to Men Perfectly. [Brand upgrade] New POYA gift packaging is online now. Free jewelry box helps to store the ring much safer and longer. Why is carbon fiber special? Very strong in certain applications Ultra lightweight Modern, high-tech look The next generation luxury material Used in really cool applications like exotic cars, NASA/Aerospace, high-end sporting equipment, yachts and more.