This 20 inch long 2.5mm cable chain is skillfully crafted with 18k gold fill and has a lobster claw clasp. It wears just like solid gold jewelry, but is a fraction of the price. Gold fill is a solid layer of gold bonded to a base metal and has 5% gold by weight. This is better quality than a gold overlay. You can wear your gold fill jewelry in water but I still would recommend not using chemicals or applying perfume with your jewelry. Our collection of gold fill jewelry is hypoallergenic. Style Number: 18883 Metal: 18k Gold Fill Dimensions: 20 inches long Want to learn more about gold fill jewelry? Visit our Gold Fill FAQ to discover how it's made, why it's more durable than gold plated jewelry, how to care for it, and why it's a favorite choice for everyday wear.