Carat Cache Sterling Silver Single Core Silver Foil Bead Unthreaded - slides onto your bracelet Universal charm bead Single core - will not come apart Sterling silver single core silver foil bead. Unthreaded to slide onto your bracelet. Compatible with most 3mm cable European charm bead bracelets. Glass beads with solid single cores of sterling silver are of higher quality and are more durable than beads which are double sided. With single core beads there are no caps to come unglued from the bead. Measures approx 14x7mm with a 4.5mm hole. As with all handmade beads size, color and pattern may vary slightly.