BIC Cristal Xtra Bold Ballpoint Pen, Black Ink, 1.6mm, Bold, Dozen Sold as 1 DZ. Writes with vividness and flair. Bold and colorful lines. Features a 1.6 mm ball point for extra bold writing. Our Quality Comes in Writing! Features Easy-Glide System exclusive ink system technology, for smoother writing and a more vivid line.