FCL Tungsten Carbide Ring 8MM Blue Carbon Fiber Inlay Black Plated Men Band Size 7-13 Material:Tungsten Carbide. Smooth Surface and Exquisite Craftsmanship. 8mm Wide Band Ring, Perfectly Suitable for Both Men and Women Size 7-13 optional,come with a ring box. Permanent Money Back Guarantee. You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!