uni-ball UB-188-M Micro Air Rollerball Pens. Premium 0.5mm Nib for Super Smooth Handwriting. Writes Like a Fountain Pen. Fade and Water Resistant.

Freedom of a fountain pen with the security of a roller-ball with no leaks, the Airs unique metal ball can move without friction when the pen is held at an angle Filled with Uni-Ball Super Ink, an advanced ink formula that bonds to paper fibers, fade resistant, water resistant, and acid free, resistant to chemicals that wash dye-based ink from checks Light pressure will give a finer line as ink is transferred by the ball itself, firmer pressure allows the ink to flow freely around the ball for a thicker line Will give you a finer line width between 0.25mm - 0.45mm, perfect for technical writing or small printing, Black Ink in a Box of 12 Sleek, elegant look and feel that is comfortable and easy to grip, capped top stays put and ensures that this pen will never leak in your pocket