Stainless Steel Registered Nurse "RN" Charm Bead. Fits Pandora, Troll, Biagi, Chamilia, Disney, and Many More Charm Bracelets For Women and Girls. Unlike Sterling Silver and Silver Tone Charm Beads Stainless Steel Charms Never Tarnish and Look Just As Good If Not Better Than Sterling Silver Items. Core Size: 5mm Unthreaded Core. Antique Silver Design.