10 Silicone Rubber Stoppers for Clip on or European Charm Spacer Bead Quantity: 10 Clear Silicone Stoppers Fits all major Brand bracelets, such as Pandora, Troll, Chamilia, Biagi, and other add-a-bead bracelets. 2 mm hole, 1.8 mm thickness Ships USPS bubble envelope first class mail. Expedited ships priority mail.