December Birthday Birthstone Charm Spacer Bead Compatible with European Bracelets Quantity: 1 Size:Hole is: 4.7 mm Slide on core (not threaded) Material: Zinc metal alloy +Rhinestones, Silver Plated Base Fits: All major Brand Bracelets, such as Pandora, Troll, Chamilia, Carlo Biagi, Zable, and other add-a-bead bracelets. European Birthstone Charm Spacer Bead (December Blue Zircon)