Pro Jewelry Ten (10) Pack of Assorted Black w/ Colors Glass Lampwork,Glass Charm Beads for Snake Chain Charm Bracelets 10 Glass in Shades of Black Mix Colors Random Size: 10mm x 9mm ,Hole is 4.5mm slide on Cores(not threaded) Fits Pandora, Biagi, Chamilia, Zable, charmed memories and Troll Chains