Size:215*11mm, WT:73g, suitable for 17.5cm-18.5cm wrist size. Can be lettering and custom patterns. Tungsten carbide is ranked second hardest next to diamond on the Mohs scale, diamond being a 10 followed by Tungsten carbide as 9. Women's Or Men's Black Real Tungsten Carbide Hologram Energy Bracelets Unisex Fashion 215mm Link Chain Bangles For Mens And Womens