DEMONIO | Green Ring, Black Tungsten Ring, Blue Offset Groove, FlatDEMONIO Tungsten Black Brushed Blue Offset Groove and Green Inside Ring 6MM, 8MM Quality design is what defines this ring. A masculine piece that will be a constant source of pride. We use only the finest grade tungsten carbide, which is six times harder than titanium, for this ring. This ring has been meticulously designed to fit the contours of your hand and comes with an easy wear comfort fit interior. We offer a Lifetime Replacement and Sizing