FCL Tungsten Carbide Ring Men 8MM Tungsten Carbide Blue Plated Matte Black Carbon Fiber Brushed Beveled Edges Material:Tungsten Carbide. Brushed Matte,polished beveled edge and exquisite craftsmanship. 8mm Wide Band Ring, Perfectly Suitable for Both Men and Women Size 7-13 optional,come with a ring box. 30 Days Money Back Guarantee