... :50*50*6mm 3,Logo: Engraving with colours. 4,Weclome OEM Metal Coin,alloy coin,silver coin,gold coin,fashion Medal*************************************************************1. Usage for Promotional ... .3.material: iron, copper, alloy, aluminium, tin etc4.technics: enamal, soft enamal,painted, epoxy, print, sand-blasting etc5.plating: Nickel, chrome ...