Biros in 4 colours, for school, study, at home and in the office. Biros with 4 colours in one pen. With one click you can change the colour without having to change the pen. Thanks to the push button you can change the colour with one click. With a 0. 4 mm stroke width. In a pack of 3. Change colour without changing pen. The BIC 4 Colours pen offers a blue, red, green and black biros in one. Perfect for colour-coding your work and creating your own bullet journal. Each of the high-precision 4 ballpoint pens with medium 1.0 mm tips offers an average writing length of 2 km. The classic design features a round barrel and a clip for attaching to notebooks. BIC simple and uncomplicated / The BIC Colours Pro is a classic biros with a glossy black barrel for sophisticated note-taking. It has a medium 1 mm tip that writes with a line width of 0.4 mm. Let the BIC 4 Colours Pro pen take care of everything. Organise your work by colour in blue, red, green and black ink. This pen is made with minimal materials, is NF Environnement certified and has an average writing length of 8 km.