Uchida Le Pen Technical Drawing Pen. These sleek barrel pens are great for all types of art and craft projects. The black pigmented ink is permanent when dry, thus making them perfect drawing, journaling, and all artwork. A perfect compliment to the Le Plume Permanent Markers. Available in black ink only and seven point sizes, each sold separately. This package contains one pen. Tip size: 0.03mm. Imported.