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Size is outside diameter. 16 gauge wire - 1.2 mm thick. 6.7 mm inside diameter. Plated brass. Nickel free.
Lead-free. Nickel-free. 9mm By the pack of 100.
Silver and Antiqued Silver beads are plated, over another metal such as copper or brass. They are coated to prevent tarnishing and need no polishing or maintenance.