1)material : iron with other material of arylic,rubber,fabric,ect. 2 ) many colors are available. 3 ) color processing way . 1 ) specialized in producing kinds of brads. 2 ) many colors are available. 3 ) size : 4mm,6mm,8mm,10mm..1 ) material : iron with other material of arylic,rubber,fabric,ect.2 ) many colors are available.3 ) color processing way : plating,spray-paint,oil-paint,silk-screen, ...