Micron Pigma - permanent pen - 08 - 0.50 mm - black
Sakura Pigma Color Technologies: The Sakura Pigma Micron drawing pen is a disposable technical pen with archival pigmented ink. Its pigmented ink is water proof, fade resistant, and quick drying. The ink does not bleed even through the thinnest paper. The Sakura Pigma Micron has a robust plastic tip that has a protective metal sleeve, making it ideal for using with rulers and straight edges.