These pens are uniquely designed to create a watercolor effect without the hassle and mess. These highly pigmented water-based pens leave you with a bright, vibrant finish. The perfectly formed watercolor brush nib makes the pens extremely versatile and is perfect for adding small detail or color washing large areas. This package contains three 6. 25 inch long pens in assorted colors. Conforms to ASTM D 4236. Imported.