The Uni-Ball Powertank Ballpoint Pen writes at any angle. Barrel contains 55 percent recycled material. Writes on wet paper, glass, leather or any shiny surface, even underwater. We understand your changes in situation and have adapted our operations to suit Füllfederhalter & Kugelschreiber BIC Ink Ballpoint & Rollerball Pens Uni-Ball SN220 Power Tank Bic Kugelschreiber Model: SN220MBL (Box 12), UPC: 4902778929933 The uni-ball POWER TANK SN-220 is a reliable retractable ballpoint pen designed to perform flawlessly even under extreme conditions. Its pressurized ink cartridge allows it to write at temperatures as low as -20°C, on wet paper, and even upside down MPN: SN220MBL (Box 12)