Gold Filled Puff Chain Necklace with an Italian Cornicello Horn CharmChain Length: 16" or 18"Material: 18 Karat Gold Filled, Hypoallergenic, Nickel-free18 Karat Gold Filled does not de-laminate or peel like Gold plated Jewelry nor does it tarnish as readily. Generally speaking, gold filled is better quality and will have a much longer lasting color than plated jewelry. To clean gold-filled it is best to use mild soap and water.