3.1 mm Titanium Anchor Chain Anchor Chains is Crafted in Gun Metal Grey to Bronze Low Polished Titanium Titanium Chain is 3.10 Millimeters in Diameter or .12 Inches Round and 24.00 Inches Long; Sleek Lobster Clasp is 9.02 Millimeters X 5.00 Millimeters Titanium Holds its Shape; Stronger than Gold or Steel, Yet Lightweight Titanium is Resistant to Corrosion; Is Impervious to Common Chemicals Hypoallergenic, Commercially Pure Titanium