Anterique Oil-Based Mini Ballpoint Pens are innovative, Japanese ballpoint pens that combine Mach Ball ink with vintage-inspired forms. Inspired by the classic American ballpoint pens of the 1960s, these compact ballpoint pens are great every day pens for work or study. The miniature size makes these pens easy to pocket and easy to use. Ballpoint pens in the past used "sticky" ink, but these oil-based ballpoint pens use "ultra-low-viscosity ink" (Mach ball ink). "Ultra-low viscosity" is ink that is extremely smooth. To prevent leaking, the special ink is combined with an ultra-precision roller ball. These pens also feature a built-in spring to precisely control the flow of ink. Crafted with a lightweight plastic body these pens offer a smooth writing experience that's reliable and comfortable. Comes in many vibrant colors to match your personal style.