Bryan, Anthonys Through Thick and Thin gold necklace Base Material: Brass Length: 16" Adjustable, 2" Built-in Extender Bar Dimensions: 18 x 5 mm (thick bar), 18 x 3 mm (thin bar) 14k Gold (nickel-free) #bff 14k gold, bar necklace, brass jewelry, layered necklace, adjustable chain, dainty pendant, minimalist jewelry, gift for best friend, nickel-free accessory, sleek design