Finejewelers 18 Inch Sterling Silver Rhodium Plated 1.7mm W/2in Ext. Box Chain Necklace Finejewelers is a reputable American Family owned Business since 1955 and now based in New York, we use the highest quality workmanship and materials, and proudly stand behind all of our products. Metal: 925 Sterling Silver. Dimensions: Width: 1.70 mm Length: 18.00 Inches Lobster Claw Clasp