This pack of 3 uni-ball Air Pens allows for versatile writing with the same quality of a fountain pen and the convenience of a rollerball, perfect as an everyday pen for use at home, in schools or in the office.This pen is a medium rollerball with all of the sophistication of a quality fountain pen - but without the mess. It\'s easy to use, simply increase the amount of pressure that you put on the pen for a thicker line. This pack is made up of black, red and blue and has plastic free packaging making it an environmentally friendly alternative to plastic.. Pack of 3. Assorted (black, blue and red). Medium 0.7mm line. Writes like a fountain pen - without leaking. Plastic Free Packaging. Adjustable line width - Apply more pressure for a thicker line . Fade Resistant, Water Resistant, Tamper Proof. Approximate dimensions (mm) H 179 W 80 D 20