uni-ball AIR rollerball refill UBA188, blue

This rollerball refill adjusts the line width to your writing pressure – light for thin lines, firmer for thick strokes.⁠‌‌‌‍‌‌‌‌‌‍‌‍‌‍‍‌‌‍‍‌‍‍‌‍‍‍‍‍‍‍‍‌‍‍‌‍‌‍‍‌⁠ Write comfortably in any position and enjoy the smooth ink flow.⁠‌‌‌‍‌‌‌‌‌‍‌‍‌‍‍‌‌‍‍‌‍‍‌‍‍‍‍‍‍‍‍‌‍‍‌‍‌‍‍‌⁠

What does a rollerball refill do?
A rollerball refill replaces the empty refill in your rollerball pen and makes your pen write smoothly again. You need this refill when your current refill has dried up or run out, so you can keep using the same pen instead of buying a new one.

Why choose the UBA188 refill?
This specific refill has been developed for uni-ball AIR rollerball pens and has reference number UBA188. The refill provides blue ink and is specially designed to fit perfectly in the corresponding pen models. By choosing the right refill, you retain all the functional qualities of your pen.

Variable line width through pressure
What makes this refill special is the variable line width that responds to the pressure you apply. When you write more lightly you get a thinner line, and with more pressure the line becomes thicker. This gives you more control over your handwriting and makes it possible to create expressive texts or drawings.

Writing in any position
A practical advantage is that this refill works in any position. Whether you write upright, hold the pen horizontally or even write upside down, the ink keeps flowing evenly. This makes the refill particularly handy for use on the go, when taking notes in awkward corners, or whenever you need to write in different positions.