Custom Hand Made Gunmetal Kryptonite CZ Nut Ring. "Make Her Your Kryptonite". This nut ring has a 4.5mm genuine Cuban zirconium imported from Europe that illuminates it's Kryptonite in the dark. The band is made up of 316 stainless steel, and the nut is made up of 304 stainless steel.
 
Click Link For Ring Size Chart: https://www.nthefastlane.com/international-ring-size-chart