18kt Gold Filled U Link Necklace Width: 7mm Guaranteed not to Tarnish-Hypoallergenic Material: 18 Karat Gold Filled, Hypoallergenic. Gold-filled does not de-laminate or peel like Gold plated Jewelry nor does it tarnish as readily as silver. Generally speaking, gold filled is better quality & will have a much longer lasting color than plated jewelry. Product Care: To properly care for your new MaLi Beads please remember to: Apply beauty products such as perfume, hairspray or deodorant before wearing your jewelry as certain chemicals in these products may damage the finish. Always remove your jewelry before swimming, doing household chores or using abrasive cleaners. 18K Thick Gold Chunky Ulink Necklace, Non Tarnish Chain, Layering Chain For Women, Thick Necklace, Gift For Her, Link Necklace