O.B Office Ball Oil-Based Pen. O.B Office Ball Oil-Based Pen is one the classic Taiwanese office pen. People in Taiwan just love this pen because it's one of the smoothest pen that's easily accessible. One advantage of oil-based pen is that it allows you to write hard on the paper (great if you like to write hard on paper!). But what's more than a typical oil-based pen is that Office Ball can deliver smooth writing when you write soft too. It's flexible. It's classic. It's so smooth that it will make you forget that you are writing with a pen.
- A pack comes with 5 pens