uniball™ Power Tank Retractable Ballpoint Pens

1 mm Medium Pen Point - Refillable - Retractable - Black Ink - Black Barrel - 1 Dozen. Pressurized cartridge works at odd angles in cold weather or wet conditions. Blends the smoothness and vibrancy of a gel pen with the fast-drying speed of a ballpoint for indelible, hybrid ink.