Bling Jewelry Assorted Ocean Blue Lampwork Murano Glass Bead Bundle .925 Sterling Silver Pandora Compatible Made of .925 Sterling Silver core Compatible with 3mm and smaller Snake Chain bracelets Unthreaded European story bracelet design Compatible with Pandora, Biagi, Chamilia, and Troll beads! From white, to ocean blue to simulated blue topaz, the December birthstone, this set of sea themed beads is clad in festive designs and patters, around a 4mm unthreaded sterling silver core, perfect for you bead story. 100% safe for sensitive skin. Copper and allergy free. Material: .925 Sterling Silver, Murano glass Lampwork Measure: 4 mm Bead Core Total Weight: 12 Grams Compatible with Pandora Charms, Biagi, Troll, Chamilia, European Style, Persona, Ohm, Kay&#039;s Charmed Memories and More. Fits both necklace and bracelet 3mm or smaller. The Unthreaded Hole Size is about 4.8mm-5mm.