This 1.65 MM Diamond-cut Cable Link Chain Necklace is 10K Yellow Gold. Approximate item weight is 3.49 grams. Length is 18 inches. Width is 1.65 MM. Lobster clasp type. Caring for Your Gold Jewelry: to keep gold shining and scratch-free, avoid contact with chlorine and other harsh chemicals. Do not wear jewelry during rough work and be sure to store it in a fabric jewelry box or pouch. To clean gold jewelry, use warm water, a mild soap, and a soft-bristled brush, if needed.