Permanent marker writes on almost any surface both indoors & out, including cardboard, metal & plastic. Carter's Large Marker delivers permanent ink in rich color so your notes are conveyed with authority. The low-odor, nontoxic ink dries in seconds. The 3/16 chisel tip allows you to vary the width of your strokes, from thin lines for small writing spaces to broad ones when you're commanding the attention of a room. The nontoxic formula is suitable for use by both adults & children, so you can make your mark at home, in school or at work. "