Gatlin: 3mm Comfort Fit Domed Couples His n Hers Wedding Band Ring Tungsten Carbide, 3271 Slender 3mm wide design; a great choice for both men and women alike. True Comfort Fit Tungsten Carbide wedding band (contoured on the inner surface for a more comfortable fit)! Highly scratch-resistant and very easy to care for; Tungsten Carbide is four times harder than Titanium. While Tungsten Carbide is an extremely hard metal, it may crack or break only under certain circumstances. This property does make it readily removeable by medical personnel in emergency situations.