This Pentel EnerGel X pen features a transparent barrel with a soft rubber grip for comfort in use and a convenient retractable design. With revolutionary liquid gel ink, the EnerGel formula is quicker drying and smoother flowing than ordinary gel ink, giving a similar sensation to liquid ink. The 1.0mm tip writes a 0.5mm line width for general use at home, work, or at school. This pack contains 12 black pens.