... side: Tinplate + paper printing or plastic +paper printing; PCB board + expoy plateBackside: Tinplate + pin or plastic + pin or PCB ... board +pinRound shape Size Diameter 20mm, 25mm, 30mm, 32mm, 35mm, 38mm ... function and keychain44mm,58mm Bottle opener(Oval)63mm x 93mm, round 55mm Dia, 65mm DiaPrintingoffset 4 colors, solid pantone color , ...