King Koe Men 8mm Tungsten Wedding Band Ring Comfort Matte Finish Life Time Warranty Six-Months money back guarantee or exchange. Life time warranty! Made of genuine tungsten carbide. Hypoallergenic, scratch resistant, durable and free of Lead and Nickel and Cobalt. 8mm Matte Finished Tungsten, great as a wedding and engagement ring for men. High Polish Smooth Inner Face, Comfortable Wearing. The smooth and gentle contrast of the polished beveled edge and the satin/brushed finish center is exquisite. All rings come with Ring Box, save your gift-wrap fee, and help you store the ring.