Chelsea Jewelry Basic Collections Italian Designed 1.9mm Wide 18K Gold Concave Curb Classic Link Chain Necklace. Hypoallergenic, Nickel Free & Scratch Resistance All of Chelsea Jewelry Stainless Steel series products are made using grade 316 materials. We pride ourselves to using the best materials that do not cause allergies nor skin irritations to our consumers. Although slightly pricier than our competitions, we know that products using grade 201 or 202 Stainless Steel will rust in no time and thus defeating the purposes of wearing them for prolong use 18K Yellow Gold Electroplated Packaged and delivered in a protective see through no frills acetate meant for an everyday experience