1, material is zinc alloy ,gold plating . 2, cufflinks are chosed as gifts ,also can be putting it for weeding, party etc 1, Music cufflinks is zinc alloy casting , cut out ,gold plating .2,process is die casting without color .3, Music cufflinks are popular among young ,and it can be for party , gifts ect .4,price is lower however looks fashine . 5, OEM is ok . music cufflinks