INDIANAPOLIS Black Carbon Fiber Inlay Tungsten Carbide Ring - 10mmHigh tech carbon fiber is joined together with the absolute strength of Tungsten Carbide in this line of Carbon Fiber Black Wedding Bands. This comfort fit wedding band is a flat style with polished beveled edges. The black carbon fiber is inlaid seamlessly into the center and then an highly scratch resistant resin is applied over it to protect the carbon fiber from wear. This 10mm wide band also comes in 4mm, 6mm and 8mm which is great for couples