This is an original OEM Free NSN4940908 rollerball pen designed for exceptionally smooth, clean writing. It writes like a gel pen while providing the strength and durability of a ballpoint pen. The translucent barrel allows for visible ink supply, and the ink is water-resistant, fade-resistant, acid-free, and liquid pigmented. Featuring a 0.5mm micro point with red ink, this pen is ideal for precise writing tasks.