18k Gold Filled Double Curb Chain in 4mm wide with lobster clasp. * Metal : 18k Gold Filled * Available in 16, 18 and 20 inches  * Weight: * 16 inches -  6.6 grams * 18 inches - 7.3 grams * 20 inches - 7.6 grams * Hypoallergenic jewelry - Nickel Free * Water resistant * Rigorously manufactured under CA Prop 65 and EU standards * Made in Brazil