1)brass and antique brass plated . 2)process: die struck without soft enamel ,with epoxy 3) NO MOQ 4)Free artwork 1)challenge coins are used for gifts,commemorative activity ,wedding etc .2) material include brass ,zinc alloy ,iron ;plating is gold ,nickel , antiques brass and antique gold etc .3)process include soft enamel ,hard enamel ,photo eached,printing .4)Any design and color is OK 5) Free ...