Refined and simplified title: Uni One Retractable Gel Ink Roller Ball Pen, Black 0.38mm, 3 Pack

The ink used in this pen is dark and vividly colored, providing a rich and intense appearance. Notably, the ink is quick-drying, allowing it to penetrate the paper surface rapidly. This quick-drying feature ensures that the ink does not bleed or seep into the paper, preventing the coloring material from being absorbed by the paper surface.

The design of the pen's shaft is simple and straight, exhibiting a clean and stylish aesthetic. Additionally, the pen features a movable clip, adding a touch of functionality and convenience to the overall design.

Regarding the pen's technical specifications, the ball diameter is 0.38 mm, which is a common size for standard ballpoint pens. The axis color and ink color are both black, providing a classic and professional look.

In summary, this pen offers a combination of functional and design-oriented features. The dark, vividly colored ink, quick-drying properties, and straightforward shaft design contribute to a visually appealing and practical writing experience. The movable clip further enhances the pen's versatility, making it a suitable choice for both everyday use and professional settings.

product information: