1,slate pen,the same function as a traditional chalk. 2, ... no.:ob-50basic material:natural talcum powdercolor of slate pen:whitesize:80*6.4mmpacking:inner box;cartonDetail information of ... goods:1,slate pen,the same function as a traditional chalk;but it ... a new product in the market.4,a slate pencil equals 20 pieces of common chalk.5,packing:24pcs/ ...