BIC 4 Colours Fluo is a new member of the family which offers you 3 different colours of ink in the same pen as well as an underliner, letting you switch between them as your work dictates so you can efficiently complete your writing tasks. The wide, fluorescent barrel contains 4 retractable points that write in black, blue, red & yellow. The 1.0mm points write with an elegant 0.32mm line width and the underliner has a 1.6mm tip with a writing line width of 0.42mm, making this a great, versatile pen for home, work or the office.