Pro Jewelry Barrel Style Weaved Blue Dark Aquamarine Crystals Charm Bead for Snake Chain Charm Bracelets Quantity: 1 Bead Size Hole is 4.5mm slide on Cores (not threaded) Fits: All major Brand Bracelets, such as Pandora, Troll, Chamilia, Carlo Biagi, Zable, and other add-a-bead bracelets.