Bic 0.4 mm Intensity Fine Assorted Fineliner pens offer a set of vibrant colors with a design that minimizes bleed through paper, although results may vary depending on paper type. The fine tip ensures smooth and precise lines, ideal for a range of applications including note-taking, creative writing, adult coloring, and journaling. The metal nib reinforces the tip for durability. The pens use water-based ink, which is optimal for paper surfaces. They are certified by the Art & Creative Materials Institute and conform to ASTM D 4236 standards, ensuring non-toxic materials. These fineliners are manufactured in Korea.