uni-ball Eye Micro UB-150 Liquid Ink Rollerball Pen 0.5mm Tip 0.3mm Line Plastic Free Packaging Blue (Pack 3) Super reliable and excellent quality, the uni-ball Eye Micro rollerball pen has been a world favourite for more than 20 years. The Eye Micro contains uni Super Ink which is fade resistant, water resistant and tamper proof making the pen ideal for important documents, school work and notes to keep and treasure. Its high quality rollerball combined with a unique uni-Flow system ensures ink flows consistently to give you a smooth writing experience down to the last drop so theres no need to worry about the pen jamming or ink suddenly running out. Its Micro 0.5mm nib is excellent for neat, clear handwriting.