FCL Blue Rings for Women 6mm Blue Carbon Fiber Silvering Celtic Dragon Inlay Blue Plated Tungsten Carbide Rings 7-13 Material:Tungsten Carbide. The blue Plated and polishing beveled edge makes you looks more generous. 6mm Wide Band Ring;Perfectly Suitable for Men and Women. Size 7-13 optional,come with a ring box. Permanent Money Back Guarantee.