BIC Cristal Pens Pack of 10; Our Biros multipack black boxes contain 10 of our iconic black biros, ideal stationery supplies for use at home, school, or the office. Black Ink Pens; Each writing pen in this pen set contains black ink only. Black biro pens are perfect pens for school examinations or administrative forms with strict ink colour requirements.​ Black Pens that are Smudge Free; These Biro pens have a 1.0mm medium nib, allowing for clear 0.4mm line width writing. BIC's black ballpoint pens have been trusted for decades.​ Writing Pens Used Worldwide; The classic BIC Cristal Original pen is the world’s best-selling ballpoint pen. It's iconic transparent, comfortable hexagonal barrel is perfect for checking ink levels.​ BIC Pens Proud 80+ Year History; BIC began in 1944 with a simple goal in mind, to create a product that would answer the fundamental consumer need for a smooth, effortless writing tool.​