Size:220*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 Unisex 220mm Celtic Dragon Knot Tungsten Carbide Hologram Bracelets with Fashion Link Chain Bangle Jewelry Gifts For Mens And Womens