Birthstone Spacer Bead Charm Quantity: 1 Bead Size: Approx: 11mm, Hole size: 4.7mm Slide on core Not Threaded. Thickness: 5.8mm Material: Zinc metal alloy (Lead and nickel safe) +Rhinestone, Silver Plated Metal Base Fits Pandora, Biagi, Chamillia, Zable, Kay charmed memories and Troll Chains