Sold as 1 Dozen. Excellent for carbons and multi-part forms. Easy to hold matte black barrel. Liquid ink. Create crisp, smooth lines with uni-ball Onyx Rollerball Pens. Ideal for creating carbon copies, these rollerball pens feature matte black barrels and slim metal tips for precision. Consistent, free-flowing ink delivers fluid writing the moment pen hits paper. Point Size: 0.7 mm; Point Type: Fine; Ink Color(s): Blue; Pen Type: Roller Ball.