4 x Uni-Ball Eye Micro 0.5mm Tip Rollerball Pen UB-150 **Buy 2 Get 10% Off!**
Liquid Ink Rollerball Pens. Liquid Ink Rollerball Pens from Uni-Ball. The micro pens include a window barrel that allows you to see when the ink is running. UB-150 Micro. Each pen includes a 0.5mm nib that writes a 0.2mm fine line.