Specificationsblack enamel cufflinks material stainless,plating gold good design and charming keep shinning,no fade fashion metel ... :ZINC ALLOY,aluminium alloy, iron or stainess steel.2.Plating:gold,silver,nickel,black nickle,3.process: casting, welding,plating, mirror ... days for sample orders. 7-20days after receiving your deposit. blue diamond setting cylinder metal cufflinks