18k Gold Filled Omega Necklace.  1.2 mm round Omega style chain necklace in 16 inches length. * Metal: 18k Gold Filled * Measures 16 inches in total length. * Weights 5.3 grams * Hypoallergenic jewelry - Nickel Free * Water resistant * Rigorously manufactured under CA Prop 65 and EU standards * Made in Brazil GOLDFI 18K GOLD FILLED Gold filled jewelry is an excellent option for those who wish to have a product of exceptional quality, beautiful and anti-allergenic, but with prices far lower than solid gold jewelry. Our products are free of harmful chemicals such as nickel, cadmium or lead. We produce our jewelry according to the standards of quality using fine 18k pure gold, thus ensuring the quality of the gold filled jewelry.