Stylish, hi-polished band is crafted in solid Cobalt with 3 inlaid CZ rounds; .18 cttw. Band is flat in the center with subtle beveled edges. Easy comfort fit inside. Personalize the inside of band with a special message up to 25 letters and spaces. Band is 8mm (approximately 5/16) wide.Cobalt Chrome is more durable than Tungsten -- the material considered the hardest of all metals. Hypoallergenic, tarnish-and-dent-resistant with a durable, long-lasting finish.