... :zinc alloy,copper,brass.2.Metal shank button size:14mm,15mm,17mm,20mm,22mm,25mm..3.Customer's design & logo is welcome ... .4.All metal button are in various colours& ... hat,etc.13,Metal button,shank button,alloy button,zinc alloy button,rivet,buckles,snap button,spring snap button,prong snap button, ring snap button,nail heads,trousers ...