CUASEN dual tip brush art marker pens have a versatile and flexible nylon fiber brush tip on one end that creates medium or bold strokes by simply changing brush pressure. The fine tip on the other end is for smooth straight lines or writing. They are the highly pigmented colors you're missing in your collection. They are built with dual tips that are fine and broad to allow you to be creative with a variety of vibrant color options. It works well with no skipping or ink flow issue. The ink dries fast and doesn't smudge and is acid-free & non-toxic. It conforms to ASTM D-4236. 48 vibrant colors including all the primary colors that artists need for drawing lines & details, painting, sketching, journaling, signing, illustrations, doodling, hand lettering, shading, rendering, manga and more. This is the perfect gift for arts and crafts, designs etc. fit for artists, students, and kids.