... ZINC . Technique : stamping Low price with high quality *material:can be made in gold,silver,zinc alloy,brass,iron and so on*size ... /finish:nickle,black nickle,gold,imitation gold,glossy copper,antiquecopper,green bronze,silver,antique silver plating and so on.*color referance ... ,via freight,by see or by DHL/UPS.EMS...express High quality Cufflink , Promotional Metal Cufflinks