Silver Chain - Mens White Chain / Franco Chain / 4.2 MMPure Silver (925) Franco Chain in 4. 2 mm with Rhodium bonded 6 times to provide optimum quality and durability. These chains are fully customizable, so you can pick your length above. Once you select your length, you can see the adjusted gram weight below the price. The chain is also water proof which will provide long lasting wear under any condition.