With their hexagonal barrel and high-quality ink, it is not difficult to see how BIC Cristal Medium ballpoint pens came to be a worldwide bestseller. These biros have quick-drying ink and a 1.0 mm nib with a durable tungsten carbide ball that produces a line width of 0.4 mm. Each of these lightweight pens has enough ink to write for an average of 3 km and are certified with the NF Environment eco-label. Not only this, the lightweight, transparent barrel of this pen creates a comfortable writing experience while allowing visible ink control. Versatile and practical they can be used in a number of places such as the office, school or at home and they're perfect for drawing, sketching and writing.