A flawless CZ attracts admiring glances in a sleek black Cobalt band rimmed with polished white edging. It's simply dreamy! Personalize inside of band with laser engraved names, dates, or any message up to 25 letters & spaces. Band is 6mm (1/4") width with a comfort fit.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.