A student essential, the retractable Signo 307 is a pen that is ideal for speedy writing, long essays, and note-taking. It writes with smooth flowing Super Ink and its rubber grip means you can write in complete comfort. This retractable rollerball helps you create perfectly smooth handwriting with uni-ball water, fade and chemicals resistant Super Ink with ISO 14145/2 certificate for use on documents. Tip carbide ball 0.7 mm. Line width: 0.4 mm. The price is per piece, commercial packaging is 12 pieces.