This glass statement necklace is made of individually formed glass circles and long links. Each glass figure eight is made by carefully shaping glass rods in a 2,000 degree flame. Made with Borosilicate (Pyrex) Glass, Life Time Warranty. Lobster clasp and jump rings are sterling silver. Length including clasp approx. 20", .75" wide Each piece comes with info card about the artist and how the piece is made.