COOLMAN Tungsten Wedding Rings for Men Black Carbon Fiber Inlaid Men's Rings 8MM Comfort Fit Ring Unique Design---8mm two-tone classic ring, High Polished and Matte Brushed Tungsten Carbide(Cobalt Free) ring, with Black Carbon Fiber Inlaid, classic ring suitable matched any occasion, wedding, business, daily leisure or more Health Material---High Quality Tungsten Carbide, PURE Healthy Carbon Fiber. Cobalt Free& Scratch Resistant, perfect weight after Ergonomic design, good for a lifetime wearing Comfort Fit Design---The comfortable feeling of wearing a ring is greatly determined by its thickness and perfect processing technology. A well made ring brings you happiness during the entire life, polished inside avoid potential hurt to your finger About Your Finger Size ---Please pay attention to your RING SIZE. If you do not know your ring size, it is a good way to measure your size and check the Ring Size Table, as the left side of the picture What You Get ---100% SATISFACTION or MONEY BACK GUARANTEE, Fashion Men's Rings, Free COOLMAN Ring Bracelet Box, Lifetime Warranty against Manufacturing Defects (only if purchased direct from 'coolman jewelry')