Uni-Ball UBA-188-EL-M RollerBall Pen Tip 0.5mm Air Rollerball Pens Blue Ink
Writes soft like a marker but durable like a roller ball. Roller-ball Pen. Tip : 0.5mm. Bold ink lay down. Ink Color - Blue. 1.6 x 1.4 x 14 cm. Variable line widths adjust to your writing style. Set of 1,3,6,9,12.