Write effectively in the toughest conditions with Power Tank Retractable Ballpoint Pens from uni-ball featuring a 1.0 mm medium point. Designed to perform optimally in extreme conditions, the pens feature a pressurized ink cartridge that offers fast & clean writing even on damp surfaces, in bitterly cold conditions or at unusual angles, including upside down. The refillable ballpoint pens come with a textured rubber grip that encourages greater writing comfort. uni Super Ink has pigmented particles that create an indelible bond with the paper, helping you create fraud, fade & water resistant documents even in harsh environments. The 1.0v mm medium point offers bold strokes with a rich color payoff for clear writing. When you need a rugged writing tool, this refillable ballpoint click pen is the best choice in any hemisphere. Pen Sub-Brand & Product Family: Power Tank RT; Pen Type: Ballpoint Pen; Pen Style: Retractable; Pen Tip Type: Conical.