The creamy, smooth, opaque ink is perfect for drawing, doodling and coloring. All colors are bright on white paper and produce outstanding effects on black paper, and the fluorescents will glow under a black light source. They work like a paint pen on colored papers, vellum and photographs. So put pen to paper and leave a colorful mark that's uniquely your own. This package contains five 6 inch long 0.3mm pens in assorted colors. Conforms to ASTM D 4236. Imported.