FCL Rings for Men Tungsten Carbide Wedding 4mm Black Plated Matte Brushed Center Polished Edge Size 7-13 Material:Tungsten Carbide. Elegant Black Plating Simple Rings. 4mm Wide Band Ring;High Polished;Perfectly Suitable for Both Men and Women Size 7-13 optional,come with a ring box. 30 Days Money Back Guarantee.