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