Upgrade your writing experience with the Uni Jetstream Pen Refill - Black Ink - 0.7mm. Designed for Jetstream multi-function pens, these high-quality refills offer a smooth and consistent writing experience thanks to their advanced low-friction ink. The 0.7 mm tip ensures clear and precise lines, making it ideal for everyday writing tasks. Each refill is packaged in environmentally friendly paper, and the increased ink content ensures longer usage. These refills are perfect for professionals and students who require reliability and performance in their writing tools.