... etched, injection, silk printed, off-set printed, PVC covering coatedFinish: can be soft enamel, imitation enamel, hard enamel (cloisonné), hand polish ... , sand blasting, with epoxy, gemstone Plating: can be gold plating, nickel plating, antique gold plating, silver plating ... over 20000pcs), good service, professional technical, OEM service available Brass round keychain