This unique Cobalt 7mm band features a satin-finished center with comfort-fit on the inside and high polished grooves and round edges. Cobalt is 4x harder than Platinum, 5x harder than Gold and 7x harder than Silver. It is hypoallegenic, scratch resistant and shatter proof. This ring is also available in Titanium, Platinum, Palladium or Gold. If interested, please call for pricing.