The uniball Air Roller offers you a unique writing experience. The tip is so smooth that it gives you a sense of freedom and tranquility. No writing angle is a challenge for the uniball Air. The pen adapts to any handwriting style. Depending on the pressure applied to the tip, you can write finer or broader. The tip is 0.7 mm wide, and the line width can vary from 0.35 to 0.6 mm. The ink is waterproof and prevents any fading of the writing.