indelible marker pen voting pen election marker pen

1)indelible marker pen,14.2cm,dimater 1.2cm ;        2) also called silver nitrate ink,since it can't be washed by water ,mostly yo be used for voting and election,the content of the silver nitrate .could ,be5%,10%,15%,25%....... according to your require,the highest concentration is 25%; 3)packing:24pcs/color box,1080pcs/carton.