Set of 3 Gram Charm Beads for snake Chain charm bracelets Quantity 3 Beads Size Hole For Gram Charm is 4.5mm slide on Cores(not threaded)Size Hole For Round Amethyst Color Charms is 4.7mm slide on Cores(not threaded) Fits and compatible with Pandora, Biagi, Chamilia, Zable, charmed memories and Troll Chains Metal: Zinc Metal Alloy Set of 3 Gram Charm Beads for snake Chain charm bracelets