... :Stamping, Die-casting, Plating, Painting, Printing, Photo etching, Imitation hard enamel/Hard enamelMaterial:ZINC ALLOY/BRASS/IRON/ALUMINUM, etcFinish Color:Nickel ... -metal, Bronze, Copper, etcRing diameters:25mm, 28mm, 32mm, 35mmLogo:Soft enamel color, Silkscreen/offset printing, Laser Engraved, EmbossedEpoxy:Epoxy coating(optional ...