Zig Memory System Calligraphy Chalk Pastel Marker, Carded, Yellow Marker features a dual tip with 2.0-mm narrow and 3.5-mm broad ends Ideal for making beautiful letters, borders and designs on paper crafts Especially best for chalk-like effects on dark colored papers Water based pigment ink is photo-safe, acid free and lightfast Conforms to astm d4236 standard; available in a yellow color