Birthstone Spacer Bead Charm (April) Quantity:1 Size: Approx: 11mm, Hole size: 4.7mm Slide on core Not Threaded. Thickness: 5.8mm Material: Zinc metal alloy +Rhinestone, Silver Tone Metal Base Fits: All major Brand Bracelets, such as Pandora, Troll, Chamilia, Carlo Biagi, Zable, and other add-a-bead bracelets. ONE Birthday spacer Bead for Pandora Troll Chamilia Biagi Bead Bracelet