Size:215*16mm WT:109g 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 Silver Real Tungsten Carbide Hologram Energy Bracelets Unisex Fashion 210mm Link Chain Bangles For Mens And Womens