10pcs Pack, 18"-20" Length Snake Chain Necklace, 1.5mm Thickness, Gunmetal Plated Brass (18" Length) Beautiful smooth chain in good quality, ready to wear and hang your pendant-on. Made of brass, electroplated in gunmetal color. Brass chains more safety than other economy base metal materials. These brass chain are lead and nickel safe, made to snake smooth style. Chain thickness is 1.5mm and length measure 18".