Revolutionary air-tip releases ink depending on pressure, creating a variable line width. The newly designed tip adjusts to style of writing depending on the pressure and angle. Uni-ball air features new technology that minimises friction, allowing for a light and smooth writing experience. Superior Quality Uni-ball Rollerball Pen Range. Fine tip, 0.7mm Roller ball. Innovative Smart Tip technology writes at any angle. Experience the next generation of roller ball pen with the uni-ball Air. Best Pen for Smooth, uniform and precision writing. Pure liquid Ink For ultra Smooth writing. Waterproof, fade-resistant, pigment ink. Extra large ink reservoir for non stop Scratch Free writing. Pure Liquid Ink Gives Smooth Writing Long Lasting, Vibrant Colour With Special Unique Nib That Gives Great Precision.