A tried and true favorite flat style created from cobalt, a silvery-white contemporary metal with uncompromising strength that will not chip or crack, is scratch resistant and hypoallergenic. As a lasting symbol of your commitment, this 6mm comfort fit satin band is designed to last a lifetime without losing its color or luster. R10644-12 Cobalt, a bio-friendly material suitable for engraving Shatterproof, scratch-resistant, hypoallergenic Satin finished, flat comfort fit design Weight is Approximately 6.43 grams Includes a custom Black Bow Jewelry Company gift box