Mason & Madison Co. Has Been Featured On. Item Details:. • Premium-grade PVD 18K Sterling Silver-plating for a durable and scratch-resistant accessory that withstands all the elements of an active lifestyle without sacrificing a luxurious look.. • Length: 16 in, Extension length: 2 in. • Silver Benefits: the Energy of BALANCE + PEACE + TENDERNESS. • Dispatched from New York, USA