Beads are made from lampwork glass, and silver cored using Sterling Silver tubing. The core is not threaded. It fits European style charm bracelets such as Trollbeads, Chamilia, Biagi, etc.
--Measurements--
Hole diameter: 5mm
Outer diameter: 14mm
Width: 7mm
Weight:3g
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http://www.etsy.com/shop/beadsworld007