Write effectively with this pack of 12 Uniball POWER TANK ballpoint pens. Designed to perform optimally in extreme conditions, these pens feature a pressurized cartridge for fast and clean writing on damp surfaces and unusual angles. The 1mm medium tip produces clean, bold strokes for enhanced readability, while a texturized rubber grip improves writing comfort. Uni Super Ink bonds seamlessly with paper for fade and water-resistant results even in harsh environments, and an integrated clip attaches to your shirt pocket or notebook for simple carrying. These Uniball POWER TANK ballpoint pens are retractable to protect the tip against damage when not in use.