925 Sterling Silver Stopper Rubber Curve Dot Round Bead For European Charm Bracelet Fits Pandora, Troll, Chamilia, Biagi and other European style Charm 3mm snake bracelets Slide on (non-threaded) Bead Made of .925 Sterling Silver (stamped) with Antiqued finished and Silicon Rubber Ring Hole size can extend from 2.5mm to 4.5mm Stopper is used to lock other beads in position, avoiding them moving around the bracelet.