A slinky, high quality, everyday statement chain. This wide curb chain necklace makes a great layering necklace, that also can stand on it's own. 5mm wide chain 16" or 18" long 18K Brazilian Gold Filled Brazilian Gold Filled is made with 3% gold bonded onto a base metal of Brass. It is more durable than gold-plating, but slightly less of a gold layer to US Gold Filled.