Sterling Silver Rhodium-plated 3mm D/C Square Franco ChainProduct Details Material; Primary Purity 925 Finish Polished Length of Item 18 in Plating Rhodium Chain Length 18 in Chain Thickness 3. 1 mm Chain Type Franco Chain Width 3. 1 mm Clasp Connector Lobster Clasp Thickness (Female end) 1. 9 mm Clasp Thickness (Male end) 3. 2 mm Clasp Width (Female end) 3. 9 mm Clasp Width (Male end) 5. 3 mm Material; Primary Sterling Silver Width of Item 3. 1 mm Product Type Jewelry Jewelry Type Necklaces Sold By Unit