The BiC Cristal Medium 1.0mm ball pen is part of the Cristal range, and is known around the world as a simple high-quality writing pen for everyday use in the home, school or office. The 1.0mm tip gives a line width of 0.4mm and can write up to two times more than regular ball pens. BiC has been producing simple, innovative and reliable products for over 60 years and millions of customers around the world have come to rely on products such as the Cristal Medium. The years of research and design BiC has undertaken in developing its stationery range means these products consistently impress customers with their usability, writing performance and colour. The BiC Cristal Medium 1.0mm ball pen is just one of those products, it is now a common feature in office stationery cupboards across the world, and as a result has helped to make BiC one of the best-known international brands because its simple, affordable, reliable and extremely effective. This pack of 10 pens contains 4 blue pens, 2 green, 2 red and 2 black.